Examination results on TMI-2 LPM charge converters YM-AMP-7023 and YM-AMP-7025

Technical Report · Mon Nov 01 00:00:00 EST 1982

DOI:https://doi.org/10.2172/6663935· OSTI ID:6663935

Murphy, M B; Heintzleman, R E

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 U.S. Nuclear Regulatory Guide 1.133.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6663935
• Report Number(s): GEND-020; ON: DE83002893
• Resource Relation: Other Information: Portions of document are illegible. Printed copy available until stock is exhausted
• Country of Publication: United States
• Language: English

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