ML20055F856

Discusses Util Planned Activities Re Instrumented Insp Technique Testing Performed at Facility in View of to Hafa Intl.Relief Requests Being Prepared by Util for Sys on Conventional Hydrostatic Testing

ML20055F856
Person / Time
Site:	Davis Besse
Issue date:	07/17/1990
From:	Shelton D TOLEDO EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
1823, NUDOCS 9007190300
Download: ML20055F856 (2)

Text

> _

V, 1

TOLEDO u EDISON A Ceetera (eeep Cam DONALD C. SHELTON Docket Number 50-346 $737*"

License Number NPF-3 Serial Number 1823 July 17, 1990 United States Nuclear Regulatory Commission Document Centrol Desk Vashington, D.C. 20555 Subject : H.A.F.A. Instrumented Inspection Technique j Davis-Besse Nuclear Power Station Unit 1 Centlement By letter dated June 4,1990, the Nwlear Regulatory Commission (NRC) Staf f informed H.A.F.A. International that the Staff considers that the testing j conducted by H.A.F.A. International using the instrumented inspection technique (IIT) was invalid, and approval to conduct IIT testing under Topical Report H.A.F.A. 135 (P-A) dated December 1985 was rescinded. The Toledo Edison Company was copied on this correspondence to H.A.F.A. The purpose of this letter is to discuss Toledo Edison's planned activities regarding IIT testing performed at the Davis-Besse Nuclear Power Station (DBNPS) Unit 1, in view of the June 4, 1990 NRC A'tter to H.A.F.A. International. 1 Toledo Edison's letters to the N'O dated October 18, 1985, (Serial Number 1199), April 11, 1988 (Scrial Nu-ber 1486), and September 8, 1988 (Serial Number 1552) requested WRC appro al for the use of IIT at Davis-Besse as an i alternative to conventional hydrastatic tests required by Section XI of the American Society of Hechanical Engineers Boiler and Pressure Vessel Code (ASME Code). The NRC granted approval of these requents by letters dated November 13,1985 (Log Number Ibsl) and September 28, 1988 (Log Number 2715).

A total of 31 IIT tests vere conducted under these approvals.

l In respoce to the rxent NRC concerns regarding the validity of IIT,  ;

_ conventional hydrostatic tests covering 12 Of the 31 IIT tests have been  ;

' completed which satisfy the first ten-year interval inservico inspection (ISI) l program. In order to alleviate any further NRC concern vith the past use of IIT at the DBNPS, Toledo Edison is adjusting the dehedule for the second ten-year ISI interval such that conventional hydrostatic tests emeriug the majority of the remaining IIT tests vill be scheduled for completlou 9067190300 900717 PDR ADOCK 05000346 (04gg l

p PDC THE TOLEDO EDISON COMPANY EDISON PLAZA 300 fMMO', Y JUE TOLEDO OHIO 4365E

• ~'

4 Docket Number 50-346 g' License 'fumber NPF-3 i

• Serial Number 1823 i Page 2 b

.l during the first period of the second ten-year 1SI interval vith any that b reesin being scheduled for completion by the end of the first refueling outage l in the second period of the second ten-year ISI interval. The second ten-year  !

ISI interval vill begin on September 21, 1990, with the-first period ending on  ;

September 21, 1993. I r

- Because the NRC staff considers past IIT testing conducted by ll.A.P.A. to be i invalid, Toledo Edison infers that the Staff also considers that the ISI l Program requirements have not been satisfied for systems where III was used as  !

an approved alternative to ASME Section XI. As it is impractical to perform conventional hydrostatic during the remainder of the first ten-year interval

- which ends on September 21, 1990, Toledo Edison is preparing relief requests in accordance with 10CFR50,35a(a)(3) snd 10CFR$0.55a(g)(5)(iv) for systems where. conventional hydrrstatic tests vill not be performed during the first  ;

ten-year interval.  ;

- Should you have any q0estions concerning this matter, please contact l Mr. R. V. Schrauder, hanager - Nuclear Licensing, at (419) 249-2366.

Very truly yours,

{

t/

PVS/mmb'- .

cci P. M. Byron, DB-1 NRC Senior R sident Inspector A. B. Davis, Regional Adminis rator, NRC Region III T. V. Vambach, DB-1 NRC Senics Project Manager i Ceneral Villiams, Chief of Staff Utility Radiolgical Safety Board of Ohio 9

, , -,