ML20044C354
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NUCLEAR REGULATORY COMMISSION REGION I j
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't 475 ALLENDALE ROAD KING OF PRUS$1A, PENNSYLVANIA 19406 q' m.s,.f
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This letter refers to the concern you provided to us on April 25',
.f 1991, alleging that an electrical wiring diagram (schenatic) for a safety-related HPSI valve motor was not updated to reflect l
a plant modification done approximately seven years ago.
We have initiated action to have the Northeast Utilities staff l
1 review this concern.
Attached is the issue as we intend to
.l' characterize it to the licensee.
We will inferr you of their l
review findings.
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Should you have any further questions, or if I can be of further j
assistance in these regards, please call ne collect at (215) 07-5225.
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l Sincerely, n
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' ' bdwa rd Ue n! I'ng'e r, Chief
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j Reacter Projects Branct I
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4 1-Attachments: As stated bec:
I Allegation Files, Fl-91-A-0077 4
T.
Shedicsky J.
Stewart f
E.
Kelly
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HUBBARD92-162 PDR
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I ENCLOSURE j
Issue The wiring diagram for the High Pressure Safety Injection Pumps B and C Common Discharge Header Isolation. Valve (2 SI-654) does not reflect actual plant conditions.
l Specifically, contacts 12 and 13, designated " spare" on the l
drawing are energized with 120 VAC.
The wiring diagram evidently had not been updated as part of a modification done under Project Assignment 84-63'which had used the l
contacts.
An additional concern exists in the fact that preventive maintenance activities have been routinely l
performed in the past with no one reporting voltage at l
contacts 12 and 13.
p Request v
t Please discuss the' validity of the above assertions.
If any deficiencies are identified in wiring diagrams and/or drawings, or in the procedural control of preventive maintenance activities, please provide us with the l
corrective actions you have taken to prevent recurrence.
i Please provide us with an assessment of the significance l
with regard to safety of any identified deficiencies.
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D UUNE ~ E -
This letter refers to the concern you provided to us on April 25, 1991, alleging that an electrical wiring diagram (schematic) for a safety-related HPSI valve notor was not updated to reflect a plant modification dope approximately seven years ago.
We have initiated action to have the Northeastern Utilities staff review this concern.
Attached is the issue as we intend to characterize it to the licensee.
We vill inforn you of their review findings.
r Should you have any further questions, or if I can be of further assistance in these regards, please call ne collect at (215) 337-5225.
Sincerely, n+:,4 Seed By Edward Wenzinger, Chief Reactor Projects Branch 4 Attachments:
As Stated bcc:
Allegation Files, RI-91-A-0077 T.
Shedlosky J.
Stewart E.
Kelly Concurrences:
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