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Developing a new regulatory framework for advanced reactors: Update on Part 53
White
The American Nuclear Society’s Risk-informed, Performance-based Principles and Policy Committee (RP3C) on March 29 held another presentation in its monthly Community of Practice (CoP) series. The presenter, Patrick White with the Nuclear Innovation Alliance (NIA), talked about the current status of efforts to develop a new regulatory framework for advanced reactors—known as 10 CFR Part 53 or simply Part 53. White serves as the research director of the NIA, where he leads their research as well as analysis-based stakeholder and policymaker engagement and education. White’s March 29 presentation is publicly available on YouTube and at ANS’s publication platform Nuclear Science and Technology Open Research (NSTOR).
RP3C chair N. Prasad Kadambi opened the CoP with brief introductory remarks about the RP3C before he welcomed White as the session’s presenter.
White covered three main topics: the history of the existing regulatory frameworks for new reactors, progress to date on the development of the Part 53 rule for advanced reactors, and the current status and next steps for the Part 53 rulemaking process.
Jeffrey N. Brooks
Fusion Science and Technology | Volume 18 | Number 2 | September 1990 | Pages 239-250
Technical Paper | Divertor System | doi.org/10.13182/FST90-A29296
Articles are hosted by Taylor and Francis Online.
Sputtering erosion of the proposed International Thermonuclear Experimental Reactor (ITER) divertor has been analyzed using the REDEP computer code. A carbon-coated plate, as well as beryllium and tungsten plates, have been examined at medium and low plasma edge temperatures. Peak net erosion rates for carbon and beryllium are very high (∼20 to 80 cm/burn · yr) though an order of magnitude less than the gross rates. Tritium buildup rates in co-deposited carbon surface layers may also be high (∼50 to 250 kg/burn · yr). Plasma contamination from divertor sputtering, however, is low (≲0.5%), Operation with low-Z divertor plates at high duty factors, therefore, appears unacceptable due to erosion, but may work for low duty factor (∼2%) “physics phase” operation. Sweeping of the poloidal field lines at the divertor can reduce erosion, typically by factors of ∼2 to 8. A tungsten-coated plate works well, from the erosion standpoint, for plasma plate temperatures of ∼40 eV or less.