NSSC Approved Criticality of Hanbit Unit 4 During Periodic Inspection and to Conduct Power Ascension and Other Remaining Tests Show
On December 9, the Nuclear Safety and Security Commission (Chairperson Yoo Guk-hee, hereinafter referred to as the"NSSC") allowed the criticality* of the Hanbit Unit 4, which had been undergoing a periodic inspection since May 18, 2017. * Criticality means to make nuclear fissions in the reactor occur continuously, resulting in the state where the generated neutrons are equal to the extinct neutrons and therefore, the number of neutrons is in equilibrium The NSSC confirmed that the criticality of the nuclear reactor can be safely achieved as they checked the structural integrity of the containment building, the completion of repairs to the voids, and inspection on 87 items, among a total of 97 items, to be performed before criticality during the periodic inspection and safety due to long-term shutdown of nuclear power plants. The main findings and results from the periodic inspection are as follows. As a result of inspecting the Containment Liner Plates* (CLP) and voids (unfilled concrete), all CLPs** that were less than the standard thickness (5.4mm) were either replaced or assessed on engineering basis, and 140 voids found in the containment building and 23 exposed steel bars found on the outer wall of the building were all repaired. * (CLP) Containment Liner Plates are a steel plate that prevents leakage of radioactive materials in the event of an accident ** A total of 300 spots (192 spots with corrosion and 108 without corrosion) The Korea Institute of Nuclear Safety (KINS) confirmed the adequacy through attendance during the repair process, and as a result of the comprehensive leak rate test of the containment building, which was re-performed after all repairs to the containment building, it was confirmed that the related technical standards were satisfied. In addition, during the periodic inspection, steam generators were replaced with the ones that have tubes made of corrosion-resistant materials to improve safety and their integrity was confirmed through looking at whether the process of manufacturing and installing steam generators was appropriate and conducting welding inspections on related pipes and non-destructive inspections on the tubes. Considering the fact that the previous periodic inspection was conducted in 2015, the status of reflecting lessons learned from the accidents and malfunctions that occurred in Korea since 2014 and the implementation status of follow-up measures of the Fukushima accident were also checked and confirmed to be appropriate. In particular, as the Hanbit Unit 4 had been shut down for more than 5 years, additional inspections were performed on major systems, including the turbine-generator systems and non-safety facilities. It was also confirmed that dry/wet preservation of the facilities and inspection of rotating equipment had been properly performed during the shutdown period, and reliability tests and maintenance of major equipment had been properly carried out. The NSSC will allow the criticality of the Hanbit Unit 4 based on the results of the periodic inspection so far, and will finally confirm its safety through follow-up tests (10 tests) such as a power uprate test.  Event International Conference on Integrated Medical Imaging in Cardiovascular Diseases (IMIC-2022)Event Solutions for Climate Change: the IAEA and CoPLatest Update Nuclear Safety and Security in UkrainePrevious Next Latest newsNews Story News Story 16 December 2022 IAEA Chief in Korea: Nuclear Energy, Safety and SafeguardsThe Republic of Korea (RoK) is a staunch supporter of the IAEA’s mandate, a strong regional partner for nuclear non-proliferation and a major player in the nuclear energy sector, IAEA Director General Rafael Mariano Grossi said this week during his visit to RoK. Read more → News Story News Story Press Release 13 December 2022 Update 136 – IAEA Director General Statement on Situation in UkraineDirector General Rafael Mariano Grossi and Ukraine’s Prime Minister Denys Shmyhal have agreed that the International Atomic Energy Agency (IAEA) will establish a continuous presence of nuclear safety and security experts at all of the country’s nuclear power plants as part of stepped-up efforts to help prevent a nuclear accident during the current armed conflict. Read more → Podcast The IAEA is the world's centre for cooperation in the nuclear field and seeks to promote the safe, secure and peaceful use of nuclear technologies. Director GeneralLatest meeting Quick linksEventsPublicationsLatest videoLatest photo essayWhat is the primary responsibility of the NRC quizlet?Evaluates information on biologic effects of radiation and provides radiation protection guidance through general recommendations on occupational and public dose limits.
Which agency regulates the control of radiation within the environment?The principal federal agencies with responsibilities for radiation protection of the public are the Environmental Protection Agency (EPA), the Nuclear Regulatory Commission, and the Department of Energy (DOE). Of these, only EPA and DOE may develop guidances or regulations for TENORM.
Which of the following organizations is responsible for enforcing radiation safety standards?The NRC, U.S. Environmental Protection Agency and the departments of Energy and Transportation are the principal federal agencies responsible for establishing radiation protection regulations.
What does the annual limit for occupational personnel not include quizlet?The annual occupational effective dose (EfD) limit does not include: Medical imaging personnel almost never receive equivalent doses that are close to the annual effective dose limit.
|
Which of the following agencies was previously known as the Atomic energy Commission?
zusammenhängende Posts
Urheberrechte © © 2024 berikutyang Inc.
