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NB/T 20341-2015Technical specification for nuclear island building hole blocking material and caulking material of PWR nuclear power plants (English PDF)

压水堆核电厂核岛厂房用孔洞封堵材料和嵌缝材料技术要求

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

April 2, 2015

Implementation date

September 1, 2015

Scope

NB/T 20341-2015 is the English-translated version of 压水堆核电厂核岛厂房用孔洞封堵材料和嵌缝材料技术要求.

NB/T 20341-2015 is the Chinese standard "Technical specification for nuclear island building hole blocking material and caulking material of PWR nuclear power plants".

Its scope clause reads: This standard specifies composition and material performance requirements for the blocking structure of nuclear island buildings, caulking type of the building structure of nuclear island, type and performance requirements of the caulking material, and test methods and basic requirements of inspection and acceptance, among others, for the hole blocking materials and caulking materials in a PWR nuclear power plant (NPP).

This standard is applicable to the inspection and acceptance of hole blocking materials and caulking materials for nuclear island buildings in a PWR NPP. Its clauses include terms and definitions.

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Document preview — NB/T 20341-2015

National Standard of the People's Republic of China

ICS: 27.120.20

Issued by: National Energy Administration of the People's Republic of China

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Hole blocking
5 Caulking
6 Test methods
7 Inspection and acceptance
8 Labeling, packaging, transportation and storage
Annex A (Normative) Test method for hole blocking materials
Annex B (Normative) Test methods for caulking material

1 Scope

This standard specifies composition and material performance requirements for the blocking structure of nuclear island buildings, caulking type of the building structure of nuclear island, type and performance requirements of the caulking material, and test methods and basic requirements of inspection and acceptance, among others, for the hole blocking materials and caulking materials in a PWR nuclear power plant (NPP).

This standard is applicable to the inspection and acceptance of hole blocking materials and caulking materials for nuclear island buildings in a PWR NPP.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 531 Rubber—Determination of indentation hardness by means of pocket hardness meters

GB/T 1766 Paints and varnishes—Rating schemes of degradation of coats

GB 8076 Concrete admixtures

GB/T 9978.1-2008 Fire-resistance tests—Elements of building construction—Part 1: General requirements

GB/T 13477-2002 Test method for building sealants

GB/T 14683 Silicone sealants for building

GB/T 16839.1 Thermocouples—Part 1: Reference tables

GB 23864 Firestop material

JC/T 482 Polyurethane sealant for building

NB/T 20133.2-2012 Specifications for protective coatings used in pressurized water reactor nuclear power plants—Part 2: Standard test method for evaluating coatings at simulated design basis accident (DBA) conditions

NB/T 20133.4-2012 Specifications for protective coatings used in pressurized water reactor nuclear power plants—Part 4: Determination of the decontaminability of coatings

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1 hole blocking function

hole blocking function of airtightness, watertightness, fire resistance and radiation shielding, among others

3.2 hole blocking structure

structure system that is composed of the penetrating items in the hole and a variety of blocking materials embedded in order to achieve the required hole blocking function, and is readily replaceable

3.3 modular sealing system

sealing and blocking system composed of a metal frame embedded in a concrete wall or floor, module of polymer materials combined in the form of building block system, and metal hold-down fitting

3.4 joint

gap retained or set up between two or more adjacent surfaces in the building structure of nuclear island

For example: settlement joint, expansion joint, prefabricated joint, e.g. the gap between drainage ditch cover and drainage ditch wall, the gap formed by equipment or support base and concrete structure surface

3.5 joint caulking system

system composed of a variety of materials embedded in the joint to meet the functional requirements of nuclear island building

3.6 backing material

material that confine the sealing depth and back shape of the sealing material […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 35 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 531 · GB/T 13477-2002

Cited by

NB/T 20388-2016Specifications for construction and acceptance for openings sealing in nuclear island of PWR nuclear power plant

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NB/T 20126-2012|NB/T 20346-2015|NB/T 20173-2012|NB/T 20325.1-2014|GB/T 15761-1995|NB/T 10934-2022

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