ML20029D135

Requests Approval to Use ASME Code Case N-416-1 for Class 1 2 Sys Re Alternate Presssure Test Requirements for Welded Repairs or Installation of Replacement Items by Welding

ML20029D135
Person / Time
Site:	Callaway
Issue date:	04/25/1994
From:	Schnell D UNION ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
ULNRC-2992, NUDOCS 9405040074
Download: ML20029D135 (3)

Text

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'O 4

l90IChGuten Avenue

- Pat Offa Box in

• St Ir.u t Macur 63166 314 S54 2GF0 Donald F. Schnell UNION April 25, 1994 Etucruic sew %ce twsident

~~-

E3 l U.S. Nuclear Regulatory Commission ATTN.: Document Control Desk Mail Station P1-137 Washington, D.C. 20555 ULNRC-2992 l

l Gentlemen: l l

i DOCKET NUMBER 50-483 l

CALLAWAY PLANT ASME CODE CASE N-416-1 The American Society of Mechanical Engineers has submitted Code Case N-416-1 to the Nuclear Regulatory Commission for review and )

approval. Code Case N-416-1 is entitled " Alternative l Pressure Test Requirement for Welded Repairs or Installation of Replacement Items by Welding." i Approval is hereby requested for use of the provisions of Code Case N-416-1 for ASME Class 1 and Class 2 systems. Approval for use on ASME Class 3 systems is specifically excluded from this request, and will be submitted for consideration on a separate letter (ULNRC-2993). The reason for separate submittal of ASME Class 3 systems is to facilitate timely approval for use of N-416-1 in ASME Class 1 and 2 systems.

Approval is requested by September, 1994, to permit utilization during Callaway's next refueling outage (currently scheduled for Spring, 1995). The need for timely approval is a result of Callaway's implementation of Code Case N-416-0. N-416-0 permits deferral of hydrostatic testing for specific ASME Class 2 repairs and replacements until the end of the 10-year ISI interval. Additionally, the NRC has approved Code Case N-498, which permits elimination of 10-year ISI hydrostatic testing for ASME Class 1 and 2 systems. Callaway has adopted Code Case N-498 which, with the exception of the tests deferred under N-416-0, eliminates the need for 10-year ISI hydroctatic tests. Approval of Code Case 030014 9405040074 940425 Ok(

PDR - ADOCK 05000483 g9-p PDs

_'U.S.

Nuclear Regulatory Commiss' ion-

,/ ULNRC-2992 Page 2

.' April 25, 1994 N-416-1 is needed in' order to eliminate the requirement for hydrostatic testing of the components deferred in accordance with Code: Case N-416-0. Cost savings resulting from elimination of these deferred hydrostatic tests are conservatively estimated at approximately $19,000.00. Cost savings resulting from elimination of all Class 1, 2, and 3 repair / replacement hydrostatic tests are estimated at approximately $225,000.00. Significant reductions in radiation exposure will'also result.

Very truly yours, i

Donald F. Schnell CDN/kea

-Q e-

. cc: .T. A. Baxter, Esq.

Shaw, Pittman, Potts & Trowbridge 2300 N. Street,;N.W.

Washington, D.C. 20037 M. H. Fletcher CFA, Inc.

18225-A Flower Hill Way Gaithersburg, MD 20879-5334 L. Robert Greger Chief, Reactor Project Branch 1 U.S. Nuclear Regulatory Commission Region III 801 Warrenville Road Lisle, IL 60532-4351 Bruce Bartlett callaway Resident Office U.S. Regulatory Commission RR#1 Steedman, MO 65077 L. R. Wharton (2)

Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 1 White Flint, North, Mail Stop 13E21 11555 Rockville Pike Rockville, MD 20852 Manager, Electric Department Missouri Public Service Commission P.O. Box 360 Jefferson City, MO 65102