ML20107B612
See also: IR 05000219/1973001
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FES M 1973
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'J.'G. Keppler, Chief, Reactor Testing and Operations' Branch.
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Directorate of Regulatory Operations, HQ
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RO. INSPECTION REPORT NO. 50/219/73-01
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JERSEY CENTRAL POWER AND LIGHT COMPANY
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M.mIA
OYSTER CREEK
BWR.
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The subject inspection report is forwarded for your action.
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This was a special' inspection to investigate the circumstances relating
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to a turbine trip on December 29, 1972, and the resulting primary system
blowdown to.the torus when a relief valve malfunctioned. Three safety
related valve failures occurred during this one incident. This incident
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continues to point up the significance of valve problems at BWR reactor
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. As you will recall, headquarters manageme.it was involved
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in promulgating additional valve testing at this facility prior to the
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facility's return to power. It is our opinion that the licensee was re-
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sponsive and completed a meaningful valve testing program prior to return
to power. .In addition, this licensee has stated his intent to continue
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an increased testing frequency (over and above Technical Specification
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. requirements) of several safety related problem valves.
It appears to
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me that an increased testing frequency of certain failure prone valves
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is a subject for a generic type RO rac-adation to DL for their con-
sideration regarding changes to Technical Specification requirements.
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One additional matter occurred, which the long term engineering ramifi-
cations are not fully understood, that is, a reported condition where
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the torus plates were observed to flex (stated to have been one half
inch) during the time when relief valves were being tested. It is
recommended that an engineering evaluation be completed regarding the
failure potential from cyclic stressing of the torus structure and
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plates. Corrosion (rusting) of the torus (observed by the inspector)
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may also become a factor in reducing the life of the torus and/or
contributing to a potential failure.
This facility is accumulating an array of extra tanks in which to store
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surplus torus water containing sodium dichromate. The State of New
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Jersey has a " sero" release limit on chromates. To date, we have not
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Form AEC-Sie (Rev. 9.$3) AECM OJ40
9604160467 960213
DEKOK95-258
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-identified any safety issue in this matter; however, DL's evt.:.uation ia
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requested regarding the hazard potential that may exist in using a 25,000
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gallon rubber bag for water storage in the torus area.
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D. L. Caphton,
Senior Reactor Inspector
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Facility Operations Branch
Enclosure:
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Subject Inspection Report No. 50-219/73-01
ce; R0 Chief, Reactor Testing and Operations Branen (21)
RO HQ (5)
Local PDR
DTIE
ate of New Jersey
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