Examination results on TMI-2 LPM charge converters YM-AMP-7023 and YM-AMP-7025
Description
During, and for several months after the Three Mile Island Unit 2 accident, the reactor vessel and two steam generators were closely monitored for the existence of coolant system loose parts. We have examined two Endevco charge converters removed from the loose parts monitoring system inside containment and found the devices to be severely degraded by gamma radiation. Because of this, it is likely that the loose parts readings made during the accident were lower than actual levels. This report discusses the cause of failure, our estimates of the total gamma radiation doses received by the charge converters, and our recommendations for changes in US Nuclear Regulatory Guide 1.133
Availability note (English)
MF available from INIS under the Report Number; Available from NTIS., PC A03/MF A01 as DE83001661.
Files
Restricted
The record is publicly accessible, but files are restricted to users with access.
Additional details
Publishing Information
- Imprint Pagination
- 28 p.
- Report number
- SAND--82-0980
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 14742107
- Subject category
- S61: RADIATION PROTECTION AND DOSIMETRY; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- FAILURE MODE ANALYSIS; GAMMA RADIATION; LOOSE PARTS MONITORING; MOSFET; RADIATION EFFECTS; REACTOR ACCIDENTS; REACTOR INSTRUMENTATION; THREE MILE ISLAND-2 REACTOR
- Descriptors DEC
- ACCIDENTS; ELECTROMAGNETIC RADIATION; ENRICHED URANIUM REACTORS; IONIZING RADIATIONS; MONITORING; MOS TRANSISTORS; POWER REACTORS; PWR TYPE REACTORS; RADIATIONS; REACTORS; SEMICONDUCTOR DEVICES; SYSTEM FAILURE ANALYSIS; SYSTEMS ANALYSIS; THERMAL REACTORS; TRANSISTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS