ML20072D470
| ML20072D470 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/08/1983 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Sternberg D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, ANPP-24005-BSK, DER-83-28, NUDOCS 8306230270 | |
| Download: ML20072D470 (4) | |
Text
-
,4 EECE!flEU mc j
Arizona Public Service Company P.o. BOX 21666 e PHOENIX. ARIZONA 85036 IM 31 I 7 py I2 4a n
June 8, 1983 ANPP-24005-BSK/RQT REG;c;;;?gg U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, California 94596-5368 Attention: Mr. D. M. Sternberg, Chief Reactor Projects Branch 1
Subject:
Final Report - DER 83-28 A."0.55(e) Reportable Condition Relating to Snubbers From Pacific Scientific Were Installed In Violation of Reserve Range Requirements File: 83-019-026; D.4.33.2
Reference:
A) Telephone Conversation between A. D'Angelo and R. Tucker on April 27, 1983
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, CLt.A ea E. E. Van Brunt, Jr.
APS Vice President Nuclear Projects Management ANPP Project Director EEVB/RQT:ru Enclosure cc:
See Page 2 M 30270 830608oocKosooog 3
' wa7
r --
.4 U. S. Nuclear Regulatory Commission Page 2
. cc: - Richard DeYoung, Director Office of' Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. L Woods, Jr.
G. C. Andognini J. A. Roedel D. B. Fasaacht A. C. Rogers B.'S. Kaplan W. E. Ide J. Vorees J. R. Bynum P. P. Klute/D. D. Green A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson R. W. Welcher R. M. Grant D. R. Hawkinson L. E. Vorderbrueggen G. A. Fiorelli-S. R. Frost Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway - Suite 1500 Atlanta, Gecrgia 30339 l
L l
L
-i FINAL REPORT - DER 83-28
' DEFICIENCY EVALUATION 50.55(e)
ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNCS f T 1 I.
Description of Deficiency Installation Specification 13-PM-204, Rev. 11, Para. 12.2.1, states in part that "The cold piston setting (CPS), at the time of installation, may differ from the setting indicated on the pipe support design drawing, provided the CPS plus any resultant thermal growth, as indicated on the pipe support design drawings, does.not extend or retract the mechanical shock arrestor into the 1 inch re serve ' rang e."
While performing preservice examinations, it was noted that fif teen -
(15) mechanical shock arrestors had final installation configurations that placed the cold set position, plus the anticipated thermal growth, in violation:of the reserve range requirement noted above. - Nonconformance Reports (NCR's) S-255-1M through S-267-1M, S-269-1M, and S-270-1M identify the arrestors in question. The subject arrestors, installed on safety related piping systems, are Pacific Scientific PSA 1/4, PSA 1/2. and PSA 3 devices.
II.
Analysis of Safety Implications
~
The design criterion used to establish' the cold setting is ' given in the Pipe Support Design Manual, Section 4.8.1, Paragraph 3.2.C.-
which states, in part, the arrestor should accommodate "the design
- stroke plus an additional amount equal to 30% of ' the manufacturers rated stroke or 1 inch, whichever is less, in the direction of thermal growth." The pipe support designer includes this travel reserve' at the end of the thermal-displacement as an additional conservative margin. As such, this : reserve could be reduced or eliminated based on engineering evaluation of specific snubber installations. The intent of paragraph 12.2.1 of specification 13-PM-204 is to allow reasonable CPS tolerance for installation of anubbers, while maintaining the intent of the design criterion.
L Each NCR condition has been evaluated for safety significance.
' Results of this evaluation show that all but one of the subject arrestors have installed cold settings such that they meet the above
[-
criterion or have sufficient travel beyond the calculated hot position to be considered acceptable as installed. The exception, snubber 1-CH-026-00Z (NCR S-256-1M), has an installed cold setting such that it will restrain the pipe from 1/16 inch of thermal expansion at the arrestor location. The piping was analyzed for this restriction and found to be acceptable as installed per 4
Computer Analysis NC-229. (dated 5/5/83).
j
~
T Final Report DER 83-28
.Page 2 Based upon the above' evaluation, there is no evidence to in icate
-that, if left uncorrected, the applicable. safety related.ptping systema would be subjected to thermal expansion stresses beyond the design analysis such that a system would fail to perform its; safety i
related function during the lifetime of the plant. This condition:
is consequantly evaluated as not reportable under the requiremento of 10CFR50.55(e).
III. Corrective Action
- 1) Specification Change Notice 3390 is being issued against Specification 13-PM-204 to clarify the intent of Paragraph 12.2.1 so that the criterion used for' mechanical shock-arrestor installation is compatible with design practicer.
- 2) NCR's S-255-1M through S-267-1M, S-269-1M and S-270-1M will be-dispositioned use-as-is.
1 L
l t
I 1
__.._,.._-l--_-.._--_--_-
~
._