ML20027D662
| ML20027D662 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/29/1982 |
| 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 8211080222 | |
| Download: ML20027D662 (2) | |
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II October 29, 1982 BLRD-50-438/82-54 BLRD-50-439/82-48 i,
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C3 uZ zm U.S. Nuclear Regulatory Commission m
eo Region II
!"2 Attn:- Mr. James P. O'Reilly, Regional Administrator 2-c;3f'1 101 Marietta Street, Suite 3100 E5 P2 Atlanta, Georgia ~30303 jp h)
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Dear Mr. O'Reilly:
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BELLEFONTE NUCLEAR PLANT UNITS.1 AND 2 - VElfrING OF HIGH POINTS IN THE I'
ESSENTIAL RAW COOLING WATER SYSTEM - BLRD-50-438/82-54, BLRD-50-439/82
- SECOND INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on August 2, 1982 in accordance with 10 CPR 50.55(e) as NCR BLN QAB 0203. This was followed by our first interim report dated September 1, 1982. Enclosed is our second interim report. We expect to submit cur next report by January 20, 1984.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY ' AUTHORITY L. M.' Mi Is,_
er Nuclear Licensing Enclosure oc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission.
Washington, D.C.
20555 i
8211080222 821029 j
DR ADOCK 05000 OFFICIAL COPY An Equal Opportunity Employer -
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i ENCLOSURE i
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 l
VErfING OF HIGH POINTS IN THE ESSENTIAL RAW COOLING WATER SYSTEM NCR BLN QAB 8203 BLRD-50-438/82-54, BLRD-50-439/82-40 10 CFR 50.55(e)
SECOND INTERIM REPORT Description of Deficiency Air vents are provided at high points of piping systems to purge air entrapped during initial filling, operation, or following maintenance func tions. Manual vents are generally acceptable; however, TVA has determined that air will come out of solution because of heating in several safety-related coolers supplied'with essential raw cooling water under accident conditions. Since access is restricted under such conditions, the manual vents would be unsuitable for these applications.
TVA design criteria failed to provide for automatic venting in the component cooling water heat exchanger, the diesel generator heat exchanger, and the component cooling pump room air-handling units.
The cause of this deficiency is incomplete censideration of all design bases during the production of design criteria.
Interim Progress Because of the addition of the air release valves to the piping systems, the piping rigorous analysis will have to be reanalyzed. However, without certain valve data this cannot be done. TVA is in the process of procuring the valves. As soon as the contract is let, the necessary data that will aid in the reanalysis of the piping system will be obtained from the valve manufacturer. All necessary drawing changes will be performed under ECN 1262.
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