NB/T 20332-2024 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
NB/T 20332-2024	RFQ	ASK	3 days	(Specification for the construction of prestressed concrete containment for pressurized water reactor nuclear power plants)	Valid
NB/T 20332-2015	340	Add to Cart	Auto, < 3 mins	Construction requirements for prestressed concrete containments for pressure water reactor nuclear power plants	Obsolete

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Basic data

Standard ID: NB/T 20332-2024 (NB/T20332-2024)
Description (Translated English): (Specification for the construction of prestressed concrete containment for pressurized water reactor nuclear power plants)
Sector / Industry: Energy Industry Standard (Recommended)
Classification of Chinese Standard: F65
Classification of International Standard: 27.120.20
Date of Issue: 2024-09-24
Date of Implementation: 2025-03-24
Older Standard (superseded by this standard): NB/T 20332-2015
Issuing agency(ies): National Energy Administration

NB/T 20332-2015 NB ENERGY INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.120.20 F 65 Registration number. 49559-2015 Replacing EJ/T 998-1996 Construction requirements for prestressed concrete containments for pressure water reactor nuclear power plants ISSUED ON. APRIL 2, 2015 IMPLEMENTED ON. SEPTEMBER 01, 2015 Issued by. National Energy Administration Table of contents Foreword ... 3  1 Scope ... 5  2 Normative references ... 5  3 Terms and definitions ... 7  4 General ... 8  5 Material ... 9  6 Concrete construction ... 15  7 Processing, fabrication and installation of ordinary rebar ... 19  8 Processing, fabrication and installation of prestressing system ... 22  9 Processing, fabrication and installation of steel linings ... 33 

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces EJ/T 998-1996 “Construction requirements for prestressed concrete containments for pressure water reactor nuclear power plants”. As compared with EJ/T 998-1996, except for editorial changes, the main technical changes are as follows. - MODIFY the normative references (see Chapter 2; Chapter 2 of 1996 version); - MODIFY the requirements for cement and aggregate (see 5.2.1 and 5.2.2; 4.2.1 and 4.2.2 of 1996 version); - ADD the requirements for admixtures (see 5.2.4); MODIFY the provisions on admixtures (see 5.2.5; 4.2.4 of 1996 version); - DELETE the requirements for bell mouth and grouting connector (4.4.4 of 1996 version); - MODIFY the requirements for prestressed tendons, anchorage, and steel strand conduit (see 5.4; 4.4 of 1996 version); - MODIFY the material requirements for steel lining and the welding (see 5.5 and 5.6; 4.5 and 4.6 of 1996 version); - MODIFY the technical requirements for concrete construction (see Chapter 6; Chapter 5 of 1996 version); - MODIFY the fabrication, processing and installation of ordinary rebar (see Chapter 7; Chapter 6 of 1996 version); - MODIFY some of the requirements for the processing and manufacture of prestressed systems (see Chapter 8; Chapter 7 of 1996 version); - ADD the requirements for in-situ test before monitoring steel strand and prestressing work (see 8.8 and 8.9); - MODIFY the welding requirements for steel linings (see 9.5; 8.5 of 1996 version). This standard shall be under the jurisdiction of the Nuclear Industry Standardization Institute. Construction requirements for prestressed concrete containments for pressure water reactor nuclear power plants

Scope

This standard specifies the processing, fabrication and installation requirements for the material, concrete construction and ordinary rebar, prestressing system, and steel linings of the prestressed concrete containment of pressure water reactor nuclear power plants. It excludes the construction of penetration pieces and gates. This standard is applicable to the construction of prestressed concrete containment for pressure water reactor nuclear power plants.

Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this Standard. GB 175 Common Portland cement GB 1499.1 Steel for the reinforcement of concrete - Part 1. Hot rolled plain bars GB 1499.2 Steel for the reinforcement of concrete - Part 2. Hot rolled ribbed bars GB/T 5224 Steel strand for prestressed concrete GB/T 8162 Seamless steel tubes for structural purposes GB/T 14370 Anchorage, grip and coupler for prestressing tendons GB/T 14684 Sand for construction GB/T 14685 Pebble and crushed stone for construction GB/T 17395 Dimensions, shapes, masses and tolerances of seamless steel tubes GB/T 50081 Standard for test methods of mechanical properties on ordinary concrete GB/T 50082 Standard for test methods of long-term performance and durability of ordinary concrete GB 50164 Standard for quality control of concrete GB 50204 Code for acceptance of construction quality of concrete structure GB/T 50205 Code for acceptance of construction quality of steel structures GB 50666 Code for construction of concrete structures JGJ 18 Specification for welding and acceptance of reinforcing steel bars JGJ 55 Specification for mix proportion design of ordinary concrete JGJ 63 Standard of Water for Concrete JGJ 85 Technical specification for application of anchorage, grip and coupler for prestressing tendons JGJ 107 Technical specification for mechanical splicing of steel reinforcing bars JGJ 225 Metallic corrugated tubes for prestressed concrete JGJ 256 Technical specification for application of headed bars DL/T 5150 Test code for hydraulic concrete NB/T 20002 Welding rules for mechanical components of PWR nuclear islands NB/T 20003.2-2010 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 2. Ultrasonic testing NB/T 20005.7-2010 Carbon steel and low alloy steel for pressurized water reactor nuclear power plants - Part 7. Classes 1, 2, 3 plates NB/T 20009.1 Welding materials for pressurized water reactor nuclear power plant - Part 1. Carbon steel covered electrodes for classes 1, 2, 3 components HAF 003 Nuclear power plant safety requirements for quality assurance HAD 003.07 Quality assurance during construction of nuclear power plants

Terms and Definitions

The following terms and definitions apply to this document. 3.1 Concrete material full performance test It refers to the test used to check the physical and mechanical properties, thermal parameters, and other indicators of concrete. 3.2 Anchorage It refers to, in the post-tensioned prestressed concrete structures, the permanent anchoring devices which are used to maintain the tension of the prestressing tendons AND transmit such tension to the structure. 3.3 Bearing plate It refers to, in the post-tensioned prestressed concrete structures, the components used to withstand the prestressing forces from the anchors AND transmit such forces to the concrete, including common bearing plates and casted bearing plates. 3.4 Trumplate It refers to the flared guide castings connected to the bearing plates and prestressed tubes. 3.5 Workability of concrete It refers to the characteristics featured by concrete mixture to meet the requirements of construction operations AND to ensure concrete uniformity and density, which mainly includes mobility, cohesion and water retention. 5.2.2.4 The maximum nominal grain size of coarse aggregates shall not be greater than. a) 1/5 of the smallest dimension between the formworks; b) Shall not exceed 31.5 mm; c) 3/4 of the minimum clear distance between the single rebar and prestressed tube. Note. If it confirms through assessment that the concrete workability and vibratory methods can avoid the generation of honeycombs or voids when placing concrete, it cannot be subjected to the above limitations. 5.2.2.5 Aggregates shall be continuously graded AND meanwhile satisfy the pumping performance. 5.2.3 Water 5.2.3.1 The concrete mixing water, curing water and aggregate cleaning water shall be drinking water. When using non-drinking water, its indicators shall comply with the requirements of JGJ 63. 5.2.3.2 The content of soluble matter in mixing water shall not exceed 2000 mg/L; as for the mixing water including the free water at aggregate surface, its chlorides content shall not exceed 250 mg/L, AND sulfate content shall not exceed 250 mg/L. 5.2.4 Admixtures 5.2.4.1 It is strictly forbidden to use the admixture that causes harm to the human body OR pollutes the environment. The type and amount of the admixture as selected for the concrete shall be agreed by the design department AND comply with the requirements of relevant standards. It is not advisable to use air-entraining agent or air-entraining admixture in the prestressed concrete. 5.2.4.2 The admixtures used for reinforced concrete and prestressed concrete shall not contain chloride ions, except for the trace of chloride ions led in by the drinking water which is used to prepare liquid admixtures. 5.2.5 Mineral admixtures 5.2.5.1 In the concrete material of the containment structure, it is allowed to admix class I category F fly ash to improve the physical and mechanical properties of the concrete. The content of fly ash in concrete shall be 6.2.3 Stirring 6.2.3.1 The stirring capacity and the corresponding stirring time of all agitators shall be determined by the agitation uniformity test. 6.2.3.2 It shall record the amount of raw material used for each batching, AND keep it. The allowable deviation of the measurement of raw materials shall comply with the relevant provisions of GB 50666. It shall measure the moisture in aggregate, AND modify the batching water amount accordingly. 6.2.4 Transportation 6.2.4.1 All equipment for transporting concrete m... ......

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