ML20070C307
| ML20070C307 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 06/28/1994 |
| From: | Carns N WOLF CREEK NUCLEAR OPERATING CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| WM-94-0101, WM-94-101, NUDOCS 9407050191 | |
| Download: ML20070C307 (3) | |
Text
.-. - ._,u ~ . _ . -
t 4*
e W$LF CREEKNUCLEAR OPERATING CORPORATION )
l 1
Ned S "BuV Carns !
Chwrnan, Pres @nt and cn., t mui~e o""'
June 28, 1994 i l
WM 94-0101 l U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-137 ;
Washington, D. C. 20555
Subject:
Docket No. 50-482: Request for Use of Code Case N-416-1 Gentlemen:
The purpose of this letter is to request approval for the use of ASME Section XI, Code Case N-416-1, " Alternative Pressure Test Requirement for Welded Repairs or Installation of Replacement Items by Welding," pursuant to the requirements of 10 CFR 50.55a (a) (3) . This code case provides an alternative to hydrostatic testing following repair / replacement of Class 1, 2, and 3 components. This code case was approved by the ASME Boiler and Pressure vessel Code Committee on Februt.ry 15, 1994, but is not included in the most recent listing of NRC approved code cases in Revision 10 of Regulatory Guide 1.147, " Inservice Inspection Code Case Acceptability - ASME Section XI Division 1."
It is requested that approval of this code case be granted by the seventh refueling outage, which is scheduled to begin September 15, 1994. Timely approval is requested in order to obtain, through implementation of the code case, the maximum achievable cost savings and reduction in radiation exposure.
It is expected that substantial cost savings and reduced radiation exposure could result from elimination of all Class 1, 2, and 3 repair / replacement hydrostatic tests during the seventh refueling outage alone. Wolf Creek j Nuclear Operating Corporation considers the alternate testing requirements proposed in Code Case N-416-1 to constitute a reasonable, safe alternative to
)
the existing hydrostatic testing requirements.
l (um u v 9407050191 940628 "" "
PDR ADOCK 05000482 An Equ I omnundy Einplown WFHC/ VET Q l{
PDR I
i
. 1
=
kiM 94-0101 Page 2 of 2 ,
1 If you liave any questions concerning this matter, please contact me at (316) 364-8831, extension 4000, or Mr. Richard D. Flannigan at extension 4500.
Very truly yours, Tyd.)- (~
Neil S. Carns
!!SC/ j ra Attachment cc: L. J. Callan (NRC), w/a G. A. Pick (NRC), w/a vi . D . Reckley (NRC), w/a T. Reis (!IR C ) , w/a
Attachment to WM 94-0101
- CASE N-416-1
, CASES OF ASME BOILER AND PRESSt'RE VESSEL CODE 4
Approval Date: February 15.1994 See Nurnenc Indes for exporstron and any reaffirmatron dates.
i l
l Case N-416-1 placement items by welding, a system leakage test may Alternalise Pressure Test Hequirement for Welded be used prosided the following requirements are men l Hepairs or Installation of Replacement Items by (a) NDE shall be performed in accordance with the l Welding, Class I,2 and 3 methods and acceptance criteria of the applicable Sub-Section XI, Disision I
(
section of the 1992 Edition of Section III, l (b) Prior to or immediately upon return to service, a l visual examination (VT 2) shall be performed in con- l Inquirv: What attemative pressure test may be per-junction with a system leakage test, using the 1992 Edi-formed in heu of the hydrostatic pressure test required tion of Section XI, in accordance with para. IWA 5000, by para, IWA-4000 for aelded repairs or installation of at nominal operating pressure and temperature.
replacement items by welding?
(c) Use of this Case shall be documented on an NIS-2 Form.
)
Reply: It is the opinion of the Committee that in lieu if the previous version of this case were used to defer of performing the bydrostatic pressure test required by a Class 2 hydrostatic test, the deferred test may be elim-para. IWA-4000 for welded repairs or installation of re- inated when the requirements of this revision are met, i
l l
l j
I l
l l
l l
l l
l l
l N
SUPP. 8 - NC