NB/T 20741-2025 Active Industry standards-Energy

NB/T 20741-2025 The inspection of the penetration piece at the bottom of the reactor pressure vessel

Publish Date: 2025-12-18 Implement Date: 2026-06-18 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: NB/T 20741-2025

Standard Type: Industry standards

Standard Status: Active

is_force_gb: no

CCS Name: Nuclear reactors and nuclear island equipment in nuclear power plants

ICS Name: Nuclear power stations, safety

Publish Date: 2025-12-18

Implement Date: 2026-06-18

Publisher: 国家能源局

Technical Committee: 中国核电发展中心

Scope

本文件适用于压水堆核电厂役前及在役期间反应堆压力容器底封头贯穿件（包含底封头焊缝及热影响区）超声、涡流、视频检验，制造阶段也可参照执行。

Development Information

Drafting Units:

中核武汉核电运行技术股份有限公司、国核电站运行服务技术有限公司、中广核检测技术有限公司、一重集团大连核电石化有限公司、东方电气（广州）重型机器有限公司、中核运维技术有限公司、中广核核电运营有限公司、生态环境部核与辐射安全中心

Drafting Persons:

蔡家藩、陈海林、聂勇、成照宇、肖镇官、李涛、陈勇、余哲、李世伟、葛亮、郭彦辉、马壮、罗炜、侯帆、汪昱成、柯涛、徐旭光、吴化峰、王希、陈胜宇、黄超、刘伯欢、张意腾

Related Standards

GB 6249-1986 Replaced

GB 6249-1986 Regulations for environmental rediation protection of nuclear power plant

Publish Date: 1986-04-23

GB/T 12726.1-1991 Replaced

GB/T 12726.1-1991 Radiation monitoring equipment for accident and post-accident conditions in nuclear power plants—Part 1:General requirements

Publish Date: 1991-02-07

GB/T 13178-1991 Replaced

GB/T 13178-1991 Partially depleted gold silicon surface barrier detectors

Publish Date: 1991-04-11

GB/T 13180-1991 Replaced

GB/T 13180-1991 G-M counter tubes for detecting γ radiation

Publish Date: 1991-04-11

GB/T 13182-1991 Replaced

GB/T 13182-1991 Scintillation detectors of sodium iodide (thallium)

Publish Date: 1991-04-11

GB/T 12726.2-1991 Replaced

GB/T 12726.2-1991 Radiation monitoring equipment for accident and post-accident conditions in nuclear power plants—Part 2:Specific requirements for equipment for continuously monitoring radioactive noble gases in gaseous effluents

Publish Date: 1991-09-03