Procedures for evaluating technical specifications Page: 3 of 12
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Figure 1. Reliability considerations for test interval
and downtime evaluations
The PETS program also continued in the development/modification of the
FRANTIC7 code to facilitate its use in STI evaluations. Specific features
have been added8 and others are planned to evaluate realistic test schedules
in nuclear power plants.
1.4 Scope of Presentation
In this paper, the PRA methodology which could be used as a cool to per-
form AOT/STI risk evaluations is described. The methodology presented will
define how PRA models could be used to calculate AOT/STI associated risk and
also Che requirements to perform evaluations which are not part of a typical
PRA. The paper will therefore focus on 1) the risks associated with AQTs/
STIs, 2) Che risk considerations when multiple AOTs/STIs are modified and 3)
the data requirements. The use of PRA models will be emphasized in this
paper illustrated largely through the aforenoted ANO-1 study. In a companion
paper9, the use of time-dependent models, e.g., FRANTIC, In evaluating the
safety impact of TS is discussed.
2. PROBLEM IDENTIFICATION
2.1 Issues
2
The issues that PETS has considered important for quantitatively evalu-
ating the risk impacts of current TS include:
• the level of risk evaluation,
• engineering and operational requirements chat the methodology should
add ress,
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Boccio, J. L.; Robinson, R. C.; Samanta, P. K. & Vesely, W. E. Procedures for evaluating technical specifications, article, January 1, 1987; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc1065899/m1/3/: accessed April 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.