ML20080G185
| ML20080G185 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 01/23/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| ANPP-28674-BSK, DER-83-67, NUDOCS 8402130291 | |
| Download: ML20080G185 (3) | |
Text
t-MGElVED Arizona Public Service Company P.O. box 21666 e PHOENIX ARIZONA 85036 584 J!Ji 30 IR S 50 January 23, 1984 ANPP-28674-BSK/.gBy jg U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. T. W. Bishop, Director Division of Resident
, Reactor Projects and Engineering Progr6ms
Subject:
Final Report - DER 83-67 A 50.55(e) Reportable Condition Relating to Ex-Core Detector Enclosures are below the Design Basis Flood Level.
File: 84-019-026; D.4.33.2
Reference:
A) Telephone Conversation between P. Johnson and R. Tucker on September 28, 1983 B) ANPP-28134 dated October 28, 1983 (Interim Report)
C) ANPP-28459 dated December 19, 1983 (Time Extension)
Dear Sir:
Attached is our firal written report of the Reportable Deficiency under 10CFR50.55(e), referenced above.
Very truly your,
CLLt qtLL E. E. Van Brunt, Jr.
APS Vice President, Nuclear ANPP Project Director EEVB/TRB:db Attachment cc:
See Page Two 8402130291 840123 Jy y 7 llg PDR ADOCK 05000528 s
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,Mr. T. W. Bishop DER 83-67 Page Two cc:
Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.
J. A. Roedel D. B. Fasnacht A. C. Rogers B. S. Kaplan W. E. Ide J. Vorees J. R. Bynum P. P. Klute A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson R. W. Welcher.
H. Foster D. R. Hawkinson L. E. Vorderbrueggen G. A. Fiorelli S. R. Frost J. Self~
D. Canady Records Center Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 l
Atlanta, CA 30339 l
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FINAL REPORT - DER 83-67 DEFICIENCY EVALUATION 50.55(e)
ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNITS 1, 2, 6 3 I.
Description of Deficiency During startup inspection it was discovered that startup and control enclosures for the non-safety related excore detectors were installed in the Containment building below the design basis flood level of 90'-6".
The eight common drain lines for the excore detectors allous water to back flow into the safety channel thimbles installed above the design basis flood level of 90'-6".
The safety channel detectors are not qualified for submersion.
II.
Analysis of Safety Implications This condition could result in a loss of excore neutron level indication during a design basis event (DBE), and is unacceptable.
Based on the above, this condition is evaluated as reportable under the requirements of 10CFR50.55(e), since if this condition were to remain uncorrected, it would represent a significant safety condition.
III.
Corrective Action A.
The startup and control enclosures will be relocated above the design basis flood level of 90'-6" for all 3 units.
The following design change packages have been issued and implementation will be prior to fuel load for the respective units.
1-SE-SE-015 2-CE-SE-015 3CE-SE-015 B.
Startup Field Report ISE-100 shall be dispositioned by referencing the DCP's and this DER.
C.
Bechtel Fngineering has determined that this condition was an isolated case and only related to the safety channel thimbles.
.