Surveillance program for WWER-440/Type 213 reactor pressure vessels -- Standard program, re-evaluation of results, supplementary program
- Nuclear Research Inst. Rez plc (Czech Republic)
Irradiation embrittlement of the reactor pressure vessel beltline materials of WWER-440/Type 213 reactors is monitored by a material irradiation surveillance program. Due to the high lead factor, the duration of the standard surveillance program is only five years, after which no further surveillance samples remain in the reactor. The large variation and uncertainty in neutron flux over the irradiated materials produce significant scatter in mechanical properties and necessitate a re-evaluation of results using gamma scanning, specimen reconstitution and recalculation. In order to provide information on the impact of changes in plant operation during later years a supplementary surveillance program has been devised.
- OSTI ID:
- 524818
- Report Number(s):
- CONF-940657--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Reconstitution technique for surveillance programs
Surveillance of WWER-440C reactor pressure vessels