ML20126H935
| ML20126H935 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 12/30/1992 |
| From: | Gates W OMAHA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| LIC-92-365, NUDOCS 9301050366 | |
| Download: ML20126H935 (2) | |
Text
%
t Omaha Public Power District December 30, 1992 444 South 16th Street Mall LIC-92-365 Omaha, Nebraska 68102-2247 402/636-2000 U. S. Nuclear Regulatory Commission ATIN:
Document Control Desk Mail Station PI-137 Washington, D.C.
20555
REFERENCES:
1.
Docket No. 50-285 American Society of Mechanical Engineers (ASME) Winter 1980 2.
Boiler and Pressure Vessel Code Section XI, 1980 Edition, Addenda Letter from CE0G 3.
Desk),"CEOGSubm(J.J.Hutchinson)RelaxationofReactorto NRC (Docum ittal of CEN 412, Coolant Pump Casing ins tion Requirements" dated November ASME Code (CE0G-91-716) pec 27, 1991 4.
Case N-481, " Alternative Examination Requirement for Cast Austenitic Pump Casin Desk), " Request fo(W. G. Gates)gs"r Approval to 5.
Letter from OPPD to NRC s
nt Provisions of ASME Code Case N-461" dated March 6, 1992 (LIC-92-074R)
Gentlemen:
SUBJECT:
Request for Interim Relief on Examination Requirements of Reactor Coolant Pump (RCP) Casings Pursuant to 10CFR50.55a(g)(5)(he requirements of Table IWB-2500-1 of ASME iii), Omaha Public Power District (0 PPD) requests interim relief from t Section XI, 1980 Edition, Winter 1980 Addenda (Reference 2).
The requirements concern the performance of a RCP casing weld examination (Item B12.10) and a RCP casing internal surface visual examination (Item B12.20)ISI) interval.during the fort Calhoun Station (FCS) second ten-year inservice inspection (
On March 6,1992, OPPD submitted a detailed request for relief (Reference 5) from the requirements of Table IWB-2500-1 based on implementation of Code Case N-481 (Reference 4).
OPPD's implementation of Code Case N-481 proposes 2 alternative examinations that will require NRC approval through a safety evaluation report (SER). However, during a meeting on October 21, 1992 the NRC Project Manager informed OPPD that this SER will not be issued until-March 1994 or later.
Because the FCS second ten-year ISI interval ends in September 1993, OPPD requests interim relief from the required exams for items B12.10 and 812.20 until the SER is issued for the Reference 5 relief request, Based on the Station RCP casing integrity will be retained (Reference 3), the fort Calhoun analyses performed in Topical Report CEN-412 for 175 years under expected service conditions.
Thus, interim relief from the examinations as requested will not significantly affect plant equipment or the health and safety of the public and plant personnel, while saving substantial radiation exposure to personnel as noted in the Reference 5 submittal.
I 9301050366 921230 PDR ADOCK 05000285 P
/
l 45 5124 Emphynent t Eg Omrtun:ty
it P.
V. S. Nuclear Regulatory Commission LIC-92-365 Page 2 NRC approval of this interim relief request is requested by April 1, 1993 to allow implementation prior to the scheduled f all 1993 Refueling Outage, if you should have any questions, please contact me.
Sincerely,
/# ). b
~
W. G. Gates Vice President WGG/sel c:
LeBoeuf, Lamb, Leiby and MacRae J. L. Milhoan, NRC Regional Administrator, Region IV R. P. Mullikin, NRC Senior Resident inspector S. D. Bloom, NRC Project Manager
.--x-_--_
___.-___.__-_____.-_.__m.____-_a m.____.-
_____-.m____--._--
-.--