ML20106D650
| ML20106D650 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 10/17/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| ANPP-30868-TDS, DER-84-61, NUDOCS 8410260109 | |
| Download: ML20106D650 (3) | |
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li?G Arizona Public Service Company 33 OCT 22 AM 10 II:
October 17, 1984iiGN VIEE ANPP-30868-TDS/IRB c
U; S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1
1450 Maria Lane - Suite 210 Walnut Creek, California, 94596-5368 Attention: Mr. T. W. Bishop, Director Division of Reactor Safety and Projects
Subject:
Final Report - DER 84-61
' A 50.5:(e) Reportable Condition Relating To Auxiliary Pressurizer Spray System.
File: 84-019-026; D.4.33.2
Reference:
A) Telephone Conversation between D. Hollenbach and T. Bradish on. August 14, 1984
~
B) ANPP-30493, dated September 12, 1984 (Interim Report)
Dear Sir:
Attached is our final written report of the deficiency referenced above, which has been determined to be Not Reportable under the requirements of 10CFR50.55(e).
Very truly yours, CLLt nt E. E. Van Brunt, Jr.
APS Vice President Nuclear Production ANPP Project Director EEVB/TRB/nj Attachment cc: See-Page Two 7
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ft Mr. T. W. Bishop DER 84-61 Page Two cc:
1 Richard DeYoung, Director Office of Inspection and Enforcement
' U. S. Nuclear Regulatory Commission Washington, D. C.
20555 T. G. Woods, Jr.
D. B. Karner W. E. Ide D.. B. Fasnacht A. C. Rogers L. A. Souza D. E. Fowler T. D. Shriver C. N.~Russo
'J. Vorees J. R. Bynum J. M. Allen A. C. Gehr W. J. Stubblefield i
W. G. - Bingham R. L. Patterson R. W. Welcher H. D. Foster D. R. Hawkinson R. P. Zimmerman L. Clyde-
- M. Woods T.'J. Bloom D. N. Stover J. D. Houchen J. E. Kirby
-D. Canady Records Center Institute of Nuclear Power Operations 1100 circle:75 Parkway, Suite 1500 Atlanta, GA 30339 g.
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s FINAL REPORT - DER 84-61 l DEFICIENCY EVALUATION 50.'55(e) 3 ARIZONA PUBLIC' SERVICE COMPANY (APS)
PVNGS UNITS 1, 2, 3 11.
s Description of Deficiency.
.s.
The NRC' stated in their letter dated April 3,1984 that the
- Auxiliary Pressurizer Spray System ( APSS) may lose the capability of, performing its intended function if the loop
- charging valve (CH-PDV-240) mechanically sticks open,- because insufficient APSS' flow toward the pressuriz'er could result.
~
Evaluation i
The Pro' ject's position is that adequate means of RCS depressurization exists to eliminate the NRC concerns. The APSS is not required f or an RSB BTP 5-1 type cooldown.
In the
' event of a single failure of loop charging valve (CH-PDV-240),
depressurization 'of. the pressurizer can be perf ormed utilizing the Gas. Vent. System. The; remote-operated valves in this depressurization path is compatible with that of the APSS.
II.
Analysis of Safety Implications Consistent with.the Project's position that failure of the loop ' charging valve does not constituce a significant defidiency, this' condition is evaluated as not reportable under the requirements of ~ 10CFR50.55(e) since;this DER does not meet the definition of design and construction deficiencies as described -in 10CFR50.55(e).. The ' APSS is part of the 'atandard C-E System 80 design which has previously been reviewed and. approved ' by the NRC in the CESSAR.. This condition is also not reportable under'10CFR Part 21.
III.
Corrective Action-l The Project has decided that a provision for a redundant valve would provide a positive safeguard for the APSS and preclude reliance on supplemental systems. Therefore this action was
. proposed in an NRC-ACRS meeting held August 10, 1984 and agreed as reasonable ~ to ameliorate concerns with the APSS. A f ail-closed pneumatically operated valve will be installed in series with valve CH-PDV-240. ;The installation of this valve -
is being perfomed by DCPs ISM, 2SM, and 3CM-CH-197, Rev. O.
These DCPs have been initiated and will be implemented prior to fuel load for all-three units..
- A letter' f rom A. E. Scherer, C-E, to D. G. Eisenhut, NRC,
.LD-84-051, dated September 18, 1984,- committed to amend
-CESSAR-F-to reflect this modification.
,