Energy

1.1 Inclusions

These provisions apply to the construction, materials, performance, and testing of NPS 1-1/4 in (32mm) and smaller self-acting service-type regulators with overpressure protection devices utilized to control the pressure of gas delivered to a customer’s piping at a delivery pressure of 2 psi or less (14 kPa).

1.2 Temperature ratings

This standard includes regulators capable of operation over an ambient temperature range of –40 to 150°F (–40 to 65.6 °C) up to the pressure recommended by the manufacturer, but not exceeding 125 psi (861.8 kPa).

1.3 Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.

1.4 Units of measurement

The yard-pound units provided are the standard. The SI (metric) equivalents in parentheses may be approximate values and are provided for information only, or for markings where both units of measurement are required.

1.1 Inclusions

This Standard applies to newly produced automatic valves constructed entirely of new, unused parts and materials. These valves can be individual automatic valves or valves utilized as parts of automatic gas ignition systems.

This Standard also applies to commercial/industrial safety shutoff valves herein after referred to as C/I valves.

Components performing functions other than those of an automatic valve are to comply with applicable American National Standards or Canadian Standards.

Compliance of an automatic valve with this Standard does not imply that the automatic valve is acceptable for use on gas appliances without supplemental tests with the automatic valve applied to the particular appliance design.

A control that incorporates two or more automatic valves and no other function (as defined by the term combination control; see Clause 3) may be tested to this Standard or to ANSI Z21.78 • CSA 6.20, at the discretion of the manufacturer.

1.2 Exclusions

This Standard does not apply to self-contained water heater, cooking appliance, or room heater thermostats, or self-contained automatic gas shutoff valves for hot water supply systems.

1.3 Types of operation

The valve operator of an automatic valve can be actuated either directly or indirectly. In addition, it can be actuated by electrical means, by mechanical means, by means of a change of the absolute pressure of gas or air upon a diaphragm, or by other means.

1.4 Pressure ratings

This Standard applies to automatic valves having maximum operating gas pressure ratings from 1/2 psi (3.5 kPa) up to and including 60 psi (413.7 kPa) and C/I valves having maximum operating gas pressure ratings of 1/2 psi (3.5 kPa) or greater (see Clauses 6 and 7).

1.5 Applicable gases

This Standard applies to automatic valves for use with one or more of the following fuel gases: natural and propane gases. It is not applicable to corrosive and waste gases.

1.6 Mounting position

This Standard applies to automatic valves that are to be mounted in the manufacturer’s specified upright position or in one or more of the optional mounting positions selected by the manufacturer. (See Clause 5.1.1.)

1.7 Pressure references

All references to psi throughout this Standard are to be considered gauge pressures unless otherwise specified.

1.8 Additional provisions for the United States

Additional provisions concerning electrical coverage applicable to units defined for use in the United States are outlined in Clause 9.

1.9 Additional provisions for Canada

Additional provisions concerning electrical coverage, instructions, and markings applicable to units destined for use in Canada are outlined in Clause 10.

1.10 Terminology

In this Standard, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; should is used to express a recommendation or that which is advised but not required; and may is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

1.11 Temperature ratings

This Standard applies to automatic valves that are capable of operation at ambient temperatures of 32 °F to 125 °F (0 °C to 51.5 °C), unless a higher temperature, lower temperature, or both, are specified by the manufacturer. (See Clause 5.1.2.)

1.12 Units of measurement

In the US, the values given in US customary units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.

In Canada, the values given in SI units are the units of record for the purposes of this Standard.

This clause of Part 1 is applicable except as follows:

 

1.1 Scope

 

Replacement:

 

This part of IEC 60730 applies to automatic electrical BURNER CONTROL SYSTEMS for the AUTOMATIC CONTROL of burners for oil, gas, coal or other combustibles intended to be used

 

• for household and similar use,

 

• in shops, offices, hospitals, farms and commercial and industrial applications.

 

This International Standard is applicable

 

• to a complete BURNER CONTROL SYSTEM,

 

• to a separate PROGRAMMING UNIT,

 

• to a separate electronic high-voltage IGNITION SOURCE,

 

• to a separate FLAME DETECTOR and

 

• to a separate HIGH-TEMPERATURE OPERATION (HTO) DETECTOR.

 

• to a BURNER CONTROL SYSTEM intended to be used in warm air heating appliances (furnaces) where the appliance is equipped with an electromechanical differential pressure control to monitor the difference of the combustion air pressure (Type 2.AL). This pressure control provides a switch as an alternative to one of the two switching elements to directly de-energize the safety relevant terminals.

 

NOTE 1 Throughout this document, where it can be used unambiguously, the word system means burner control system and systems means burner control systems.

 

NOTE 2 Throughout this document, the word equipment means appliance and equipment.

 

This standard does not apply to thermoelectric flame supervision controls; thermoelectric flame supervision controls are covered by ISO 23551-6.

 

This document also applies to electrical BURNER CONTROL SYSTEMS intended exclusively for industrial process applications e.g. those applications covered by ISO TC 244 (ISO 13577).

 

This document applies to controls powered by primary or secondary batteries, requirements for which are contained within the standard, including Annex V.

 

1.1DV.1 D2 Modification of 1.1 of the Part 2 by adding the following:

 

Components of burner control systems such as electrodes, flame supervision, oxygen depletion safety shut-off systems (ODS), thermoelectric safety shut-off devices, pilot burners, thermocouples, fast-acting thermocouples, and other components are covered by this Part 2-5. (Refer to Annex DVKK.)

 

1.1DV.2 D2 Modification of 1.1 of the Part 2 by adding the following note:

 

NOTE 3DV Requirements for separate ignition transformers are covered in UL 506 and CSA C22.2 No. 13.

 

1.1DV.3 DE Modification of 1.1 of the Part 2 by adding the following:

 

In Canada, this Standard applies to equipment that is intended to be installed or used in accordance with CSA C22.1, Canadian Electrical Code, Part I. In Canada, general requirements applicable to these products are provided in CSA C22.2 No. 0.

 

1.1.1 This document applies to the inherent safety, to the declared OPERATING VALUES, OPERATING TIMES and OPERATING SEQUENCES where such are associated with burner safety and to the testing of automatic electrical BURNER CONTROL SYSTEMS used in, on, or in association with, burners.

 

NOTE Requirements for specific OPERATING VALUES, OPERATING TIMES and OPERATING SEQUENCES are given in the standards for appliances and equipment.

 

1.1.2 This document applies to AC or DC powered systems with a rated voltage not exceeding 660 V AC or 600 V DC.

 

1.1.3 This document does not take into account the RESPONSE VALUE of an AUTOMATIC ACTION of a CONTROL, if such a RESPONSE VALUE is dependent upon the method of mounting the control in the equipment. Where a RESPONSE VALUE is of significant purpose for the protection of the user, or surroundings, the value defined in the appropriate equipment standard or as determined by the manufacturer applies.

 

1.1.4 This document applies also to systems incorporating ELECTRONIC DEVICES, requirements for which are contained in Annex H.

 

1.1.4DV D2 Modification of 1.1.4 of the Part 2 by adding the following:

 

This Standard also applies to manufacturing and production testing (see Annex DVLL) and solid-state oil igniters (see Annex DVMM).

 

1.1.5 This document applies to systems using NTC or PTC thermistors, additional requirements for which are contained in Annex J.

 

1.1.6 This document includes systems responsive to flame properties and temperature for HTO.

 

1.1.7 This document applies to the electrical and functional safety of controls capable of receiving and responding to communications signals. The signals may be transmitted to or received from external units, connected wired or wireless, that may or may not be part of the burner control system.

 

1.1.8 This document does not address the integrity of the output signal to the network devices, such as interoperability with other devices, unless it has been evaluated as part of the control system.

Note: See Annex F for explanatory material.

1.1 Inclusions

Note: See Annex F for explanatory material.

 

1.1.1 Vehicle maintenance

This Code applies to the portions of a motor vehicle maintenance facility where hydrogen gas-fuelled vehicles and hydrogen transport trailers are maintained, repaired, or stored during maintenance or repair, including areas and systems ancillary thereto. If a vehicle being maintained has multiple fuels and one of the fuels is compressed hydrogen gas, then the requirements of this Code would apply.

Note:

See Annex  F for explanatory material.

See Annex A for facilities for large storage capacity vehicles and trailers.

1.1.2 Vehicle parking

This Code also contains information on private parking structures where hydrogen gas-fuelled vehicles are parked or stored, including areas and systems ancillary thereto. See Annex D.

 

1.1.3 Parking structure requirements

For purposes of this Code, private parking structures have the same requirements as minor repair areas.

 

1.2 Exclusions

The scope of this Code does not include

a) indoor or outdoor refuelling operations;

b) open parking structures;

c) public parking structures of any construction;

d) other fuels used for vehicles; or

e) liquid hydrogen (LH2) vehicles;

f) natural gas vehicle maintenance facilities, which are covered in CSA B401.1;

g) propane vehicle maintenance facilities, which are covered in CSA B401.2; or

h) battery electric vehicle maintenance facilities, which are covered in CSA B401.4.

 

Note: See Annex F for explanatory material.

1.3 Purpose

The purpose of this Code is to provide reasonable means to manage the risks associated with the maintenance and repair of vehicles fuelled with gaseous hydrogen (GH2) inside motor vehicle maintenance facilities.

Note: See Annex F for explanatory material.

1.4 Terminology

The terms “fuelling” and “refuelling” are used interchangeably in this Code. The terms “park” and “store” and all derivatives thereof are used interchangeably in this Code.

1.5 Units of measure

The values given in SI units are the units of record for the purposes of this Code. The values given in parentheses are for information and comparison only.

Notes:

1) IEEE/ASTM SI 10 or ISO 80000-1 can be used as a guide when converting Imperial units to metric units.

2) Less than 1 m will be shown in mm.

3) 1 m or more will be shown in m to the nearest 0.1 m.

4) Ft/in conversions will be rounded to the nearest full inch using traditional rounding conventions.

5) Pressures will be rounded to the nearest whole value using traditional rounding conventions.

6) Where the word “gallon” is used in this Code, it indicates a U.S. gallon equivalent to 3.785 L water capacity.

1.6 Gauge pressure

All references to pressure throughout this Code are to be considered gauge pressures, unless otherwise specified.

1.7 Mandatory language

In this Code, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Code; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Code.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

Note: See Annex F for explanatory material.

1.1 Inclusions

This Standard provides requirements for the design and qualification of components for the monitoring and display of NPPs and NPP facility irradiated fuel storage safety functions in the event of a design basis accident (DBA) or a design extension condition (DEC) during the operational phase of the facility lifecycle.

Notes:

This Standard applies only to the functions of plant systems, including safety systems and process control systems, associated with monitoring in the event of an accident; other monitoring functions are beyond the scope of this Standard.

The requirements for a DBA and those for a DEC might differ. Where requirements differ for a DBA and a DEC, the difference is explicitly stated.

General requirements and guidance regarding DECs [as a subset of beyond design basis accidents (BDBAs)] are covered in CSA N290.16.

The operational phase of the facility lifecycle would include the period of time wherein the reactor is capable of operations, generally from the end of commissioning with fuel loaded, through to the end of operations with fuel unloaded prior to decommissioning.

1.2 New and existing NPPs

This Standard applies to existing NPPs and new NPPs.

Notes:

The requirements for new plants and existing plants might differ. Where requirements differ for new plants and existing plants, the difference is explicitly stated.

For existing NPPs, the application should address the information in this Standard to the extent practicable. Any alternative approaches selected or mitigating measures applied should be identified.

This Standard may provide guidance for nuclear facilities other than NPPs, using a graded approach.

1.3 Application

This Standard applies to components and systems that enable NPP staff, in the event of an accident, to

monitor and display the plant safety functions for diagnosing that an accident, including severe accident, is occurring or has occurred;

Note: The purpose of monitoring the plant safety functions is to guide operator actions that might be required as a part of the accident response.

 

monitor and display plant conditions for the purposes of accident management to continuously address the state of safety functions; and

Note: Accident management refers to specific actions taken within the NPP during the evolution of an accident to prevent escalation, mitigate consequences, and to achieve a long-term controlled stable state. Accident management actions are the responsibility of the plant operator. Refer to CNSC REGDOC-2.3.2 for further clarification.

 

monitor and display parameters for the initiation of on-site and off-site emergency management to confirm the effectiveness of the accident management actions.

Notes:

Emergency management in this context refers to the overall coordinated response to, mitigation of, and recovery from a nuclear emergency. Emergency management is not concerned with the specific actions taken within the NPP to manage the accident (i.e., accident management as described above). Emergency management actions can be the responsibility of the operating organization or other jurisdictions
(e.g., operator emergency response organizations, government bodies, emergency workers). Refer to CSA N1600 for guidance on nuclear emergency categorization and notification.

If the emergency planning basis, as defined in CSA N1600, does not require off-site emergency management actions, any functions associated with monitoring off-site parameters may be excluded where justified.

 

1.4 Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

1.1 Inclusions

Cette norme énonce les exigences relatives à la conception et à la qualification des composants pour la surveillance et l’affichage des fonctions de sûreté des centrales nucléaires et des installations de stockage du combustible irradié dans le cas d’un accident de dimensionnement (AD) ou d’une condition additionnelle de dimensionnement (CAD) pendant la phase d’exploitation du cycle de vie de l’installation.

Notes :

Cette norme s’applique uniquement aux fonctions des systèmes de la centrale, y compris les systèmes de sûreté et les systèmes de commande des procédés, associées à la surveillance en cas d’accident; les autres fonctions de surveillance ne font pas partie du domaine d’application de cette norme.

Il peut y avoir des différences entre les exigences pour un AD et celles pour une CAD. De telles différences, lorsqu’elles existent, sont explicitement mentionnées.

Les exigences et les lignes directrices relatives aux CAD (un sous-ensemble des accidents de dimensionnement [AD]) sont traitées dans CSA N290.16.

La phase d’exploitation du cycle de vie de l’installation comprendrait la période pendant laquelle le réacteur est capable de fonctionner, généralement de la fin de la mise en service lorsque le combustible est chargé à la fin de l’exploitation lorsque le combustible est déchargé avant le déclassement.

 

1.2  Centrales existantes et nouvelles centrales

Cette norme s’applique aux centrales existantes et aux nouvelles centrales.

Notes :

Les exigences peuvent différer pour les nouvelles centrales et pour les centrales existantes. De telles différences, lorsqu’elles existent, sont explicitement mentionnées.

Dans le cas des centrales existantes, la demande devrait, dans la mesure du possible, porter sur les informations contenues dans la présente norme. Toute autre approche sélectionnée ou mesure d’atténuation appliquée devrait être indiquée.

Cette norme peut orienter les installations nucléaires autres que les centrales nucléaires, selon une méthode graduelle.

1.3 

ApplicabilitéCette norme s’applique aux composants et aux systèmes qui, en cas d’accident, permettent au personnel de la centrale nucléaire de :

a) surveiller et afficher les fonctions de sûreté de la centrale pour diagnostiquer qu’un accident, y compris un accident grave, se produit ou s’est produit;

Note : La surveillance des fonctions de sûreté de la centrale a pour but de guider l’opérateur dans le choix des mesures d’intervention requises à la suite de l’accident.

 

b) surveiller et afficher l’état de la centrale aux fins de gestion des accidents pour traiter en continu l’état des fonctions de sûreté; et

Note : La gestion des accidents fait référence aux mesures particulières prises dans une centrale nucléaire pendant l’évolution d’un accident de manière à en empêcher l’intensification, atténuer les conséquences et atteindre un état stable contrôlé à long terme. La responsabilité des mesures de gestion des accidents incombe à l’exploitant. Voir le document REGDOC-2.3.2 de la CCSN pour plus de précisions à ce sujet.

 

c) surveiller et afficher les paramètres pour le déclenchement des mesures de gestion des urgences sur le site et hors site pour confirmer l’efficacité des mesures de gestion des accidents.

Notes :

Dans ce contexte, la gestion des urgences fait référence à l’intervention globale coordonnée pour atténuer une urgence nucléaire et reprendre les activités à la suite d’une telle urgence. La gestion des urgences ne porte pas sur les mesures particulières à prendre dans une centrale nucléaire pour gérer les accidents (c.-à-d., pour la gestion des accidents telle que décrite à l’alinéa précédent). Les mesures de gestion des urgences peuvent être la responsabilité de l’exploitant ou d’autres autorités compétentes (p. ex., les organismes de gestion des urgences de l’exploitant, les organismes gouvernementaux, des travailleurs d’urgence). Voir la CSA N1600 pour les lignes directrices sur la catégorisation des urgences nucléaires et les annonces en cas d’urgence nucléaire.

Si le fondement de la planification d’urgence, telle que définie dans CSA N1600, ne nécessite pas de mesures de gestion des urgences hors site, toute fonction associée à la surveillance des paramètres hors site peut être exclue lorsque cela est justifié.

North American deviation

[Replace the scope of this Standard with the following]

This document provides safety related requirements for construction, operation under normal and abnormal conditions and the testing of fuel cell stacks and fuel cell modules. It applies to fuel cell stacks and fuel cell modules with the following electrolyte chemistry:

• alkaline, for e.g. potassium hydroxide;

• polymer electrolyte (including direct methanol fuel cells), for e. g. PEM, AEM (anion exchange membrane);

• acidic, for e.g. phosphoric acid;

• molten carbonate;

• solid oxide;

• aqueous solution of salts.

Fuel cell stacks and fuel cell modules can be provided with or without an enclosure and can be operated at significant pressurization levels or close to ambient pressure.

These requirements can be superseded by other standards for equipment containing fuel cell stacks and fuel cell modules as required for particular applications.

This document does not cover fuel cell road vehicle applications.

This document is not intended to limit or inhibit technological advancement. An appliance employing materials or having forms of construction differing from those detailed in the requirements of this document can be examined and tested according to the purpose of these requirements and, if found to be substantially equivalent, can be considered to comply with this document.

The fuel cell stacks and fuel cell modules are components of a final product or system. The final products or systems that integrate these fuel cell stacks or fuel cell modules will require evaluation according to appropriate end-product safety requirements, such as:

CSA/ANSI FC 1 * CSA C22.2 No. 62282-3-100 for stationary fuel cell power systems; or

ANSI/CSA America FC 3 for portable fuel cell power systems;

Note 1 to entry: A fuel cell module can consist of one or more, but not all, integrated system components.  An assembly which is made up of all the integrated system components of a final product or system is not considered a module. (Figure 1A).

This document covers only up to the DC output of the fuel cell module.

This document does not apply to peripheral devices outside the fuel cell module as illustrated in Figure 1A.

This document does not cover the storage and delivery of fuel and oxidant to the fuel cell module.

This document does not cover fuel cell power systems (“modules” or “battery replacements”) for industrial trucks that are in the scope of UL 2267.

This standard covers the above-noted products that are intended to be installed or used in accordance with:

CSA C22.1, Canadian Electrical Code (CE Code) Part I,

NFPA 70, National Electrical Code (NEC)

Note 2 to entry: Fuel cell stacks and fuel cell modules are components integrated into fuel cell power systems that are then installed per the electrical codes noted above.

1.1  Généralités

La présente norme énonce les exigences relatives à la gestion du vieillissement des enceintes de confinement en béton des centrales nucléaires et leurs éléments, et s’adresse aux propriétaires, exploitants, concepteurs, fabricants et constructeurs des enceintes de confinement en béton et de leurs éléments.

Les enceintes de confinement en béton comprennent les éléments structuraux et non structuraux suivants :

le béton;

le renforcement (avec et sans précontrainte);

l’acier (p. ex., membrane protectrice, pièces encastrées, ancrages);

les systèmes de membranes protectrices non métalliques et de revêtement;

les garnitures de joint et les arrêts d’eau; et

les éléments nécessaires au support des enceintes de confinement (p. ex., fondations).

 

 

Notes : La présente norme peut fournir des conseils concernant la gestion du vieillissement d’autres structures en béton, le cas échéant.

Les exigences relatives à la gestion du vieillissement des composants de confinement sont énoncées dans CSA N290.20.

 

1.2  Enceintes de confinement en béton existantes

La présente norme énonce les exigences relatives à la gestion du vieillissement des enceintes de confinement en béton existantes afin d’être en mesure de traiter les problèmes émergents et d’assurer que les enceintes de confinement en béton et leurs éléments existants répondent aux exigences fonctionnelles et aux exigences de performance qui les concernent au cours des diverses phases de leur cycle de vie.

Note : Les exigences de la série CSA N287 pourraient varier en fonction de la phase du cycle de vie de la structure, notamment la conception, la construction, la mise en service, l’exploitation (y compris l’exploitation à long terme et l’arrêt prolongé) et le déclassement.

1.3  Nouvelles enceintes de confinement en béton

La présente norme énonce les exigences relatives à la gestion du vieillissement des nouvelles enceintes de confinement en béton afin de s’assurer que :

le vieillissement est pris en considération durant leur conception et leur construction; et

les enceintes de confinement en béton et leurs éléments satisfont à leurs exigences fonctionnelles et de performance à toutes les étapes de leur cycle de vie.

1.4 Interface

La présente norme est utilisée conjointement avec les autres normes de la série N287, le cas échéant.

 

1.5   Terminologie

Dans la présente norme, le terme « doit » indique une exigence, c.-à-d. une prescription que l’utilisateur est obligé de respecter pour assurer la conformité à la présente norme; « devrait » indique une recommandation ou ce qu’il est conseillé, mais non obligatoire; et « peut » indique une option ou ce qui est permis compte tenu des limites de la présente norme.

Les notes qui accompagnent les articles ne comprennent pas d’exigences ni d’exigences alternatives; le but d’une note accompagnant un article est de séparer du texte les éléments explicatifs ou informatifs.

Les notes au bas des tableaux et des figures font partie du tableau ou de la figure et peuvent être rédigées comme des exigences.

Les annexes sont qualifiées de normatives (obligatoires) ou d’informatives (facultatives) pour en préciser l’application.

1.1  General

This Standard provides aging management requirements for concrete containment structures and their elements for nuclear power plants and is directed to the owners/operating organizations, designers, manufacturers, fabricators, and constructors of the concrete containment structures and their elements.

Concrete containment structures include the following structural and non-structural elements:

concrete;

reinforcement (pre-stressed and non-prestressed);

steel (e.g. liner, embedded parts, anchors);

non-metallic liners and coating systems;

joint sealants and water stops; and

elements necessary to support the containment structure (e.g. foundations).

 

 

Notes: This Standard may provide guidance for aging management of other concrete structures where applicable.

The aging management requirements for containment components are provided in CSA N290.20.

 

1.2  Existing concrete containment structures

This Standard provides requirements for aging management of existing concrete containment structures to address emerging challenges and ensure that existing concrete containment structures and their elements satisfy their functional and performance requirements in all different phases of their life cycle.

Note: The requirements of the CSA N287 series of Standards can be different depending on the phase of the life cycle of the structure, including design, construction, commissioning, operation (including long-term operation and extended shutdown), and decommissioning.

 

1.3  New concrete containment structures

This Standard provides requirements for aging management of new concrete containment structures to ensure that

aging is addressed during design and construction phases; and

concrete containment structures and their elements satisfy their functional and performance requirements in all phases of their life cycle.

1.4 Interface

This Standard is used in concert with the other N287 series of Standards as applicable.

 

1.5   Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.