ML20064M033
| ML20064M033 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 02/03/1982 |
| 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 8302150444 | |
| Download: ML20064M033 (2) | |
Text
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r' TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II February 3, 1983
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U.S. Nuclear Regulatory Commission Region II d
i Attn:
Mr. James P. O'Reilly, Regional Administrator U:
101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 w
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Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNIT 1 - OVERPRESSURIZATION OF MAKEUP AND PURIFICATION PIPING AND VALVES - BLRD-50-438/82 REVISED FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector D. Quick on May 28, 1982 in accordance with 10 CFR 50.55(e) as NCR 1808.
This was followed by our interim reports dated June 28 and August 10, 1982 and our final report dated October 12, 1982. As discussed with Inspector P. E. Fredrickson by telephone on January 31, 1983, enclosed is our revised final report.
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 f
DsW l
L. M. Mills, Manager i
Nuclear Licensing Enclosure oc: Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
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4 ENCLOSURE BELLEFGTE NUCLEAR PLANT UNIT 1
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OVERPRESSURIZATION OF MAKEUP AND PURIFICATION PIPING AND YALVES
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REVISED FINAL REPORT
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Description of Deficiency During a recent preflush. leak test, the piping and valves on the suction side of the unit 1 p eup pumps were inadvertently subjected to a pressurg of 1530 lb/in g.
The pressure was applied ig increments
.5 of 200 lb/in after an initial pressurization of 100 lb/in. pe design pressure for the subject piping and valves is 675 lb/in. The
'cause of the deficiency was site personnel failed to take into account differences in pressure boundaries during leakage testing.
Safety Implications TVA does not know the exact safety implication; thus, TVA assumes overpressurization of the subject piping system has jeopardized its integrity. The.aefore, the subject condition could have adversely affected
' the safe. operation of the plant.
x Corrective Action The following actions are being taken to ensure that the subject valves are adequate:
The valves will be used "as is" upon the completion and successful results of the following actions. Any valves that are found deficient will be replaced.
1.
Each valve will be visually examined for signs of distress.
2.
The Borg 'Jarner valve gland retainers will be inspected and replaced, if necessary.
3 Each valve will be fully cycled and timed for successful valve operability.
4.
Each valve will be checked for functionally adequate seat tightness during a valve leak rate test."
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