ML19345B734
| ML19345B734 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 11/21/1980 |
| From: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-80-315-000 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8012020437 | |
| Download: ML19345B734 (2) | |
Text
.
SOUTH CAR 0bMA ELECTRIC a gas COMPANY '
DOST OFFICE son 744 CoLuMeiA, Souf H CAnouMA 29218 vic p....u...
c ca: ~e November 21, 1980 k
T. C. NicMots. J n.
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Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission 4
Region II, Suite 3100 m
101 Marietta Street, N. W.
Atlanta, Georgia 30303
Subject:
Virgil C. Summer Nuclear Station Reportable Substantial Safety Hazard 10CFR21 Docket No. 50/395
Dear !!r. O'Reilly:
On 11/21/80, a substantial safety hazard as defined by 10CFR21 was reported to Mr. John K. Rausch at the NRC Region II office. The item 4-involved the omission of an interlocking contact in the. swing component cooling pump that prevented it from starting on a load sequencer signal when it is lined up as the primary pump. This was an error in the design as submitted,by the architect engineer. Details are given on the attach-
_ ment.
The item is being reported under our 10CFR50.55(e) procedure. This is considered a final report on the matter.
i Very truly yours, l
T. C. Nichols, Jr.
_ JAW:TCN:rh cc:
V. C. Summer-G. H. Fischer.
T. C. Nichols, Jr.
E.
H.' Crews, Jr.
- 0. S. Bradham D. A. Nauman O. W. Dixon,-Jr.
2
.R. B. Clary W. A. Williams, Jr.
fh j B.-A. Bursey hh k
J. L. Skolds.
g)
J. B. Knotts H. E..Yocom I&E (Washington).
Document ibnagement Branch NPCF/Whitaker File
' 18012010 M S
o 10CFR21 - SUBSTANTIAL SAFETY HAZARD
.l.
Name and' Address'of Reporting _ Individual James A. Wactor 4
P.'O.-Box 764 Columbia, South Carolina-29218 2.
Identification of Basic Component Component Cooling Water Pump Control Circuit 3.
Identification of Firm Supplying Component Gilbert Associates, Inc.
P. O. Box 1498 Reading, Pennsylvania 19603 4.
Nature of Defect, Substantial Safety Hazard Created, and Evaluation An interlock contact was left out of the control circuit of the " swing" pump that would prevent it from starting on a load sequencer signal when it was lined up as the A or B primary pump. This could have resulted in loss of cooling water to the RHR and other safety related systems.
This was identifiad by startup field report 2577 dated 5/31/80.
5.
Date Information of Defect Was Obtain_d -
'7/8/80 6.
Number and Location of Defect a
The defect effected only the one " swing" component cooling water pump.
7.
Corrective Action The interlock has been inscalled in the circuit. The architect engineer has been notified, but feels that this is an isolated incident and no procedure or design criteria revisions are necessary.
8.
Advice to Purchasers or Licensees None.
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