ML20097J858
| ML20097J858 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 08/31/1984 |
| From: | Morgan R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-84-435-000 PT21-84-435, PT21-84-435-000, RSEP-84-544, NUDOCS 8409240065 | |
| Download: ML20097J858 (3) | |
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H. B. ROBINSON STEAM ELECTRIC PLANT POST OFFICE BOX 790 HARTSVILLE, SOUTH CAROLINA 29550 AUG 311984 Robinson File No:
11720 Serial: RSEP/84-544 Mr. James P. O'Reilly, Regional Administrator United States Nuclear Regulatory Commission Region II 101 Marietta Street, N. W., Suite 3100 Atlanta, Georgia 30323 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 DOCKET NO. 50-261 LICENSE NO. DPR-23 10CFR21 REPORT ON TEST SWITCHES
Dear Mr. O'Reilly:
Carolina Power and Light Company hereby notifies the NRC of an item reportable under 10CFR21.
Enclosed is the H. B. Robinson, Unit 2, 10CFR21 Notification Form.
Mr. Austin Hardin, NRC Region II, and Mr. Guy Beatty, Jr., Manager of the Robinson Nuclear Project have been :.otified of this report.
If you have any questions concerning this report, please contact our staff or me.
Very truly yours, R. E. Morgan General Manager H. B. Robinson SEG Plant CLW/wp Enclosure M697 8409240065 840831 PDR ADOCK 05000261 B
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NRC - 10CFR21 NOTIFICATION FORM Robinson File No. 13520A Report Date:
29 Aug. 84 CAROLINA POWER AND LIGHT COMPANY H.B. ROBINSON SEG PLANT, UNIT NO. 2 POST OFFICE BOX 790 HARTSVILLE, SOUTH CAROLINA 29550 Docket No. 50-261 License No. DPR-23 1.
Nature of defect or failure to comply:
Approximately 10% of the switches purchased for test switches in the protection / safeguard circuitry did not pass installation continuity checks.
Block, Contact RE Block, Contact RC 2.
Date Identified:
29 Aug. 84 3.
Basic component information (if applicable):
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a.
Supplier:
REES, Inc., Fremont, Indiana b.
Component Quantity:
11
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c.
Where Located:
Reactor protection / safeguard test switches 4.
Nature.of the defect or failure to comply and the safety hazard which was or could be created:
Test switch is placed in the open position to allow test of circuit.
Failure of switch to pass signal in normally closed position would prevent actuation of the respective protection / safeguard signal.
5.
Advice related to the defect or failure to comply received from supplier:
Manufacturer indicated this appears to be an isolate'd problem and is inves -
tigating.
6.
Corrective action that was, is, will be taken; and length of time that has been or will be taken to complete the action:
(Attach additional sheets as necessary.)
See Attached 7
Submitted Ey:
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s Corrective Action Which Has Been Taken:
1.
Reverified continuity of REES test switches which passed continuity checks and were installed.
2.
Disassembled switches not passing continuity check and observed that contacts appeared deformed.
3.
Disassembled switches that passed continuity check, and contacts appear normal.
Corrective Action Which Will Be Taken:
1.
Review interim test methods to ensure that continuity testing as a result of this concern is adequate because the only method of visual inspection requires destroying contact.
2.
Temporarily increase the frequency of continuity testing until results justify return to normal frequency.
3.
Long Term - Determine the feasibility of improving the quality of the current switches or replacement by another qualified vendor.