ML20009F575
| ML20009F575 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 07/07/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8107310320 | |
| Download: ML20009F575 (2) | |
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400 Chestnut Street Tower II lll Sv July 7, 1981 ~
SQRD-50-328/81-42 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region II - Suite 3100 101 Marietta Street Atlanta, Georgia 30303 Dear Mr. O'Reilly.
SEQUOYAHh3dLbALP'.ANTUNIT2-REVISEDERCWPREOPTESTINSTRUCTION INADEQUATE - SQRD-50-328/81 FIRST INTERIM REPORT The subject oeficiency was initially reported to NRC-01E Inspector R. V. Crlenjak on Mcy 4, 198i in accordance with 10 CFR 50.55(e) as NCR SQN NEB 8129 Enclosed is our first interim report. We expact to submit our next report by August 10, 1981.
If you have any questions, please get in touch with D. L. Lambert at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Regulation aad Safety Enclosure cc:
Mr. Victor Stello, Direccor (Enclosure) l Office of Inspection and Enforcement l
U.S. Nuclear Regulatory Commission Washington, DC 20555' sll I
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8107310320 810707 PDR ADOCK 05000328 S
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e ENCLOSURE
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SEQUOYAH NUCLEAR PLANT UNIT 2 REVISED ERCW PREOPERATIONAL TEST INSTRUCTIONS INADEQUATE SQRD-50-328/81-42 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency The Preoperational Test Instruction'TVA-18C for the Essential Raw
' Cooling Water (ERCW) System Flow Balance did not provide steps to ensure adequate documentation and control of the throttle valve positions. When tests simulating various plant operating modes were perfcrmed, the throttle valve positions were supposed to be documented and no valve position change was to be made that would adversely affect the flow distribution.
f The test data sheets had locations for recording throttle valve positions. However, during the conduct of the test, the throttle valve positions were not always recorded, and in some instances, the 1
throttle valves were closed to a more restrictive position than they had been set at in the previous test.
When the tests were concluded, some or che valves were apparently left in a position which adversely affected the flow balance distribution established in the earlier tests. No record was made to verify that the valves were placed in the proper throttling position at the l
completion of the test.
l At the conclusion of the test the throttle valves were to be tagged and the throttle position marked on the tags per the requirements of i
the preoperational test scoping document TVA-18, section 5.2 3 1.
The valves have not been tagged as required.
Interim Progress TVA has completed an evaluation of the preoperational test data and has identified areas where potential problems exist. We arc in the
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process of determining what, if any, actions are required to resolve this deficiency.
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