NF ISO 17873

NF ISO 17873

April 2006
Standard Current

Nuclear facilities - Criteria for the design and operation of ventilation systems for nuclear installations other than nuclear reactors

ISO 17873:2004 specifies the applicable requirements concerning the design and use of ventilation systems in nuclear installations such as hot cells, nuclear fuel fabrication and examination laboratories, plutonium-handling facilities, reprocessing plants, enrichment facilities, nuclear-waste treatment stations, storage facilities, etc. The purpose of ventilation and containment systems is to ensure safety functions and protect workers, public and environment against the spread of radioactive contamination resulting from the operational processes of these installations. ISO 17873:2004 does not apply to the containment envelope of nuclear power plants and some research reactors where high pressure can occur during accident scenarios. It does apply to auxiliary rooms of these facilities.

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Main informations

Collections

National standards and national normative documents

Thematics

Sécurité, Gestion des risques et SST, QSE

Publication date

April 2006

Number of pages

57 p.

Reference

NF ISO 17873

ICS Codes

13.280   Radiation protection
27.120.20   Nuclear power plants. Safety

Classification index

M62-250

Print number

1 - 24/03/2006

International kinship

ISO 17873:2004
Sumary
Nuclear facilities - Criteria for the design and operation of ventilation systems for nuclear installations other than nuclear reactors

ISO 17873:2004 specifies the applicable requirements concerning the design and use of ventilation systems in nuclear installations such as hot cells, nuclear fuel fabrication and examination laboratories, plutonium-handling facilities, reprocessing plants, enrichment facilities, nuclear-waste treatment stations, storage facilities, etc.

The purpose of ventilation and containment systems is to ensure safety functions and protect workers, public and environment against the spread of radioactive contamination resulting from the operational processes of these installations.

ISO 17873:2004 does not apply to the containment envelope of nuclear power plants and some research reactors where high pressure can occur during accident scenarios. It does apply to auxiliary rooms of these facilities.

Table of contents
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  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    1
  • 4 Fonctions assurées par le système de ventilation
    5
  • 5 Aspects de sûreté des systèmes de ventilation
    6
  • 5.1 Principes généraux
    6
  • 5.2 Procédure d'évaluation des risques
    6
  • 6 Principes de confinement des matières radioactives
    8
  • 6.1 Exigences générales
    8
  • 6.2 Exigences spécifiques associées aux systèmes de confinement
    11
  • 6.3 Dispositions complémentaires pour limiter le risque de dissémination de la contamination radioactive
    12
  • 6.4 Dispositifs d'épuration d'air
    13
  • 7 Principes de prévention des autres risques
    14
  • 7.1 Prévention des risques liés aux dégagements thermiques et aux rejets de gaz ou de vapeurs toxiques
    14
  • 7.2 Prévention contre les dépôts de matières dans les conduits de ventilation
    14
  • 7.3 Prévention des risques d'incendie
    14
  • 7.4 Considérations sur les risques d'origine externes
    18
  • 8 Méthodologie de dimensionnement des systèmes de ventilation
    18
  • 8.1 Classification de l'installation en zones de travail
    18
  • 8.2 Exigences relatives aux paramètres principaux de ventilation
    20
  • 8.3 Élaboration des schémas de ventilation et calcul des pertes de charge
    27
  • 9 Recommandations relatives à l'exploitation et la conduite des systèmes de ventilation
    28
  • 9.1 Organisation et procédures d'exploitation
    28
  • 9.2 Règles générales d'exploitation
    28
  • 9.3 Considérations sur la gestion de l'exploitation
    28
  • 9.4 Procédures d'essais et maintenance
    29
  • 9.5 Surveillance du système de ventilation
    31
  • 9.6 Conduite du système de ventilation pour prévenir le risque d'incendie
    31
  • 10 Systèmes de conduite et instrumentation
    33
  • 10.1 Systèmes de conduite
    33
  • 10.2 Instrumentation
    34
  • 10.3 Alarmes
    34
  • Annexe A (informative) Exemple de classification des zones de travail en fonction du risque de contamination radioactive
    36
  • Annexe B (informative) Exemple de classification des types de ventilation en fonction des risques de contamination radiologique - Recommandations concernant la configuration des systèmes de ventilation associés
    38
  • Annexe C (informative) Exigences relatives aux filtres à particules utilisés dans les systèmes de ventilation
    43
  • Bibliographie
    49
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