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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Deep Space: The new frontier of radiation controls
In commercial nuclear power, there has always been a deliberate tension between the regulator and the utility owner. The regulator fundamentally exists to protect the worker, and the utility, to make a profit. It is a win-win balance.
From the U.S. nuclear industry has emerged a brilliantly successful occupational nuclear safety record—largely the result of an ALARA (as low as reasonably achievable) process that has driven exposure rates down to what only a decade ago would have been considered unthinkable. In the U.S. nuclear industry, the system has accomplished an excellent, nearly seamless process that succeeds to the benefit of both employee and utility owner.
Takashi Sato
Nuclear Technology | Volume 99 | Number 1 | July 1992 | Pages 22-35
Technical Paper | Fission Reactor | doi.org/10.13182/NT92-A34700
Articles are hosted by Taylor and Francis Online.
The safety design of the Toshiba Boiling Water Reactor (TOSBWR) was created ∼8 yr ago. The design concept is intermediate between conventional boiling water reactors (BWRs) and the advanced BWR (ABWR). It utilizes internal pumps and fine motion control rod drive, but the emergency core cooling system (ECCS) configuration is different from both conventional BWRs and the ABWR. The plant output is 1350 MW(electric). The design is based on two important philosophies: the positive cost reduction philosophy and the constant risk philosophy. The former aims to improve the cost-effectiveness of safety design; the latter seeks a uniform distribution of plant risk. To implement these two philosophies, the TOSBWR safety design utilized system subdividing and probabilistic risk assessment insights. Because of these philosophies, the TOSBWR safety design has combined large cost reductions with safety improvements. The core damage frequency due to multiple failures is reduced about one order of magnitude compared with conventional BWRs, while the capacity of the low-pressure ECCS is reduced to ∼60% of that of the conventional BWR5.
