ML20076E894
| ML20076E894 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/11/1983 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Sternberg D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, ANPP-23733-RQT, DER-81-29, NUDOCS 8306010341 | |
| Download: ML20076E894 (4) | |
Text
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cara Arizona Public Service Company y
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P.o box 21666. PHOEN!X. ARIZoN 36 g { f, ( i rfD, '
May 11, 1983 ANPP-23733-RQT/BSK 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 - Revision 1 - DER 81-29 A 50.55(e) Reportable Condition Relating to Failure of ASTM A490 Bolts File: 83-019-026; D.4.33.2
Reference:
A) Telephone Conversation between T. Eckhardt and B. S. Kaplan on May 21, 1981 B) ANPP-18237, dated June 18,1981(Interim Report)
C) ANPP-19545, dated November 25, 1981 (Final Report)
Dear Sir:
Enclosed is revision one of the subject Deficiency Evaluation Report under the requirements of 10CFR50.55(e). This revision is being issued to provide a more detailed report of the condition description, analysis of safety implication, and corrective action with respect to the ASTM A490 and ASTM A324 bolts.
Very truly yours, C C(
C CUL TeLLC %
E. E. Van Brunt, Jr.
APS Vice President Nuclear Projects Management ANPP Project Director EEVB/RQT:db Enclosure cc: See Page 2 8306010341 830511
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PDR ADOCK 05000529 I
S PDR 2[
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Mr. D. M. Sternberg May ll, 1983 ANPP-23733-RQT/BSK Page 2 cc:
Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission
. Washington, D. C. 20555 T. G. Woods, Jr.
G. C. Andognini J. A. Roedel D. B. Fasnacht i
A. C. Rogers B. S. Kaplan W. E. Ide 1
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
9 FINAL REPORT - DER 81-29 DEFICIENCY EVALUATION 50.55(e)
ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNITS 2 & 3 I.
DESCRIPTION OF DEFICIENCY During the assembly of the Unit 2 Fuel Building roof truss structure on column lines FB and FC, twenty-two (22) ASTM A490 bolts (l"D x 6-11"L,approximately 11 each on the two trusses) 3 failed to reach the required torque of 1100 f t.-lbs.
These bolts were supplied by Marathon Steel Company and manufactured by Lake Erie Screw Corporrtion.
Subsequently, during bolting of Unit 3 Auxiliary Building 140' - 0' elevation structural steel from column lines Ag to At and row lines jf(
At to A10, approximately thirty (30) ASTM A325 bolts (7/8"D x 3"L) failed to reach the required torque of 540 f t.-lbs.
These bolts were supplied by Marathon Steel Company and manufactured by Nippon Steel.
II.
ANALYSIS OF SAFETY 1hPLICATIONS A detailed investigation of the Unit 2 Fuel Building ASTM A490 bolt failures revealed that all twenty-two (22) defective bolts were being installed in two (2) joints of the two (2) roof trusses.
If left uncorrected, this condition could possibly lead to a partial roof failure during an SSE, which might cause damage to safety-related equipment. The deficiency in ASTM A490 bolts is therefore potentially safety significant, representing a deviation from performance specificat ions, and is reportable under the requirements of 10CFR?J.55(e).
For the Unit 3 Auxiliary Building ASTM A325 bolt failures, a
/h hardness test was performed by Field Engineering. Two samples were drawn, where four (4) out of thirteen (13) and two (2) out of eleven (11) ASTM A325 bolts had hardnesses outside of the limits.
This -indicates that the Unit 3 Auxiliary Building bolt failures are the result of a material deficiency.
If lef t unrepaired, the condition could potentially result in the failure of the Auxiliary-Building 140' - 0" elevation structural steel during an SSE, which could possibly lead to damage of safety-related equipment. The deficiency in ASTM A325 bolts is therefore potentially safety significant, representing a deviation from performance specifications, and is also reportable under the requirements of 10CFR50.55 (e).
III CORRECTIVE ACTION 1)
The defective ASTM A490 bolts in the Unit 2 Fuel Building documented in Nonconformance Report CF-2833 were replaced following the standard repair procedure.
3 2)
The defective ASTM A325 bolts in the Unit 3_ Auxiliary Building documented in Nonconformance Report CA-3489 were replaced following the standard repair procedure.
3)
An inspection program has been implemented to verify the tension in high strength bolts (including ASTM A325 and A490) in structural steel connections.
This inspection program is in accordance with subsection 6 (d) 5 of the AISC specification for structural joints using ASTM A325 or A490 bolts dated April 26, 1978.
4)
Bechtel Pcwer Corporation has filed a 10CFR Part 21 Report j
with the Nuclear Regulatory Commission to give notification of the defective ASTM A490 bolts supplied by Marathon Steel and manufactured by Lake Erie Screw Corporation.
5).
Bechtel PVNGS Project also considers the deficiency in the ASTM A325 bolts supplied by Marathon Steel and manufactured by Nippon Steel to be reportable under the requirements of 10CFR Part 21 by the supplier. This revision to Deficiency Evaluation Report 81-29 addresses the reporting requirements specified under 10CFR 21.21(b) (3) with the exception of sub-part (vi) which requires the number and location (customers and/or facilities) of other possible defective equipment. A copy of this report will-be sent to Marathon Steel requesting their review for reporting under 10CFR Part 21 including number and location of all components supplied.
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