Update of HTGR risk assessment study

Conference · Mon May 01 00:00:00 EDT 1978

OSTI ID:6767402

Houghton, W. J.; Joksimovic, V.

The HTGR Accident Initiation and Progression Analysis (AIPA) study team has completed its Phase II. The latest volume of the study (GA-A15000) presents the Phase II risk assessment including implementation of R and D recommendations. This paper is based on material presented in that report and, hence, it updates the public literature on the status of the HTGR risk assessment study. Event trees for core heatup have been improved to contain about 20 additional initiating events, resulting in 22 separate heatup scenarios, and to assess containment damage caused by gases generated during concrete decomposition. Risk assessments, presented in the form of complementary cumulative distribution function of accident frequency versus health effects dose and health effects tables at meaningful frequency levels (for example, greater than 10/sup -7/ year/sup -1/), continue to show the strong effect of inherent safety features and a high degree of relative safety.

• Research Organization: General Atomics, San Diego, CA (United States)
• DOE Contract Number: EY-76-C-03-0167-065
• OSTI ID: 6767402
• Report Number(s): GA-A-14569; CONF-780507-17; TRN: 78-014414
• Resource Relation: Conference: Probabilistic analysis of nuclear reactor safety, Los Angeles, CA, USA, 8 May 1978
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
HTGR TYPE REACTORS
REACTOR ACCIDENTS
RISK ASSESSMENT
PROBABILITY
RADIATION DOSES
STATISTICS
ACCIDENTS
DOSES
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
MATHEMATICS
REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210300 - Power Reactors
Nonbreeding
Graphite Moderated