GB/T 41591-2022 in English

VALID

Initial criticality tests for pressurized water reactor of nuclear power plants

Issued on:2022-07-11
Implemented on:2023-02-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 41591-2022
Document status:	VALID
Title in English:	Initial criticality tests for pressurized water reactor of nuclear power plants
Title in Chinese:	压水堆核电厂反应堆首次临界试验
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2022-07-11
Implemented on:	2023-02-01
ICS Classification:	27.120.20-Nuclear power plants. Safety
Chinese Classification:	F63-Power reactor
Professional Classification:	GB-National Standard
Related Keywords:	pressurized water reactor reactor criticality test standardsnational standard gb/t41591-2022 nuclear power plants introductionoverview initial criticality tests nuclear power plant
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《GB/T 41591-2022压水堆核电厂反应堆首次临界试验》由TC58（全国核能标准化技术委员会）归口，TC58SC3（全国核能标准化技术委员会反应堆技术分会）执行，主管部门为国家标准化管理委员会。

Introduction

Overview of Reactor Criticality Test Standards

National standard GB/T41591-2022 clarifies the system verification requirements for the first controlled chain reaction of a pressurized water reactor nuclear power plant, including the establishment of specifications for six major types of test initial conditions, and specifies the operating boundaries of the two start-up modes of rod dilution. The standard focuses on controlling the joint test process of the source range detection system and the reactivity instrument.

Analysis of key technical links

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Control item	Liquid dilution control method	Gas dilution control method
Critical extrapolation method	Real-time ICRR calculation(countdown rate)	Four-point linear countdown correction
Applicable scenarios	Typical large-scale power station	Regional small experimental reactor
Operation cycle	≥72 hours continuous monitoring	Segmented operation mode

Key operation assessment indicators

Chapter 8.4 Establish the accuracy requirements of the nuclear critical modulus: The relative deviation between the reactivity measurement value (ρF) and the doubling period estimated value (ρD) must be continuously stable within the range of ±4%. Under abnormal conditions, the unit must trigger the second-level protection setting.

Implementation of the recommended system

System calibration preset: Complete the source range channel and DCS system 72 hours before the test
Graded monitoring mechanism: Acute nuclear dose changes trigger secondary condition assessment
Digital archives: The commissioning report strictly follows the NB/T20145 chapter model

More samples: NB/T 47013.2-2015 GB 50021-2001(2009) GB 18306-2015

Sample only — not a preview of GB/T 41591-2022

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