ML20087A415
| ML20087A415 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 01/03/1992 |
| From: | Gates W OMAHA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-89-04, GL-89-4, LIC-91-333R, NUDOCS 9201090104 | |
| Download: ML20087A415 (2) | |
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Omaha Public Power District 444 South 16th Street Mall Omaha, Nebraska G8102 2247 402/636 2000
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Januar'y 3 1992 llc 91-33$R U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station PI-137 Washington, DC 20555
References:
1.
Docket No. 50-285 2.
NRC Generic Letter 89 04 dated April 3, 1989 3.
Letter from OPPD (W. G. Gates) to NRC (Document Control Desk) dated October 8, 1990 LIC-90 0756) 1 4.
Letter from NRC D. L.
igginton) to OPPD (W. G. Gates) dated i
November 18, 199 l
5.
Letter from NRC (D. L. Wigginton) to OPPD (W. G. Gates) dated November 22, 1991 Gentlemen:
SUBJECT:
Res)onse to Request for Additional Information Concerning the fort Ca11oun Station (FCS) Inservice Testing Program for Pumps and Valves Attachment I contains Omaha Public Power District's (OPPD's) response to a request for additional information (Reference 5) related to components in the FCS Inservice Testing Program for pumps and valves.
If you should have any questions, please contact me.
Sincerely it<.- f.bAJ' W. G. Gates Division Manager Nuclear Operations WGG/sel c:
LeBoeuf, Lamb, Laiby & MacRae R. D. Martin, NRC Regional Administrator, Region IV D. L. Wi inton, NRC Senior Project Manager R. P. Nu ikin, NRC Senior Resident Inspector 5 lb yj h
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' Attachment 1 LIC 91-333R-OPhD RESPONSE TO REQUEST FOR ADDil!0NAL INFORMATION CONCERNING FORT Call 10VN STATION INSERVICE TEST PROGRAM FOR PUMPS AND VALYU NRC Question No. 1 Charging pump discharoe check valve CH 198 is verified to open but is not verified to close. Afso check valves CH 203 and CH 204 are verified open but not closed. If there is a charging line break outside of containment, i
there is a direct path from the primary' to atmosphere.
Why is there no verification for the three check valves closing?
OPPD Response Check valves CH 198, CH 203 and CH 204 are in the charging line to the RCS cold legs.
The two inch charging line penetrates the containment via i
penetration M 3.
The unresolved issue of 10CFR50 Appendix J testing of penetration M 3 (Reference 4) will be addressed in a separate response to the NRC.
Closing verification for the three check valves is not required for the following reasonst 1.
As presently designed and proceduralized, the two-inch charging line will be pressurized via charging or HPSI pumps following a LOCA, which is considered to be the bounding event. Therefore, the valves-do not provide a containment isolation function in the closed position.
ing and check valves CH 198 CH 203, and CH-The charging system pip! in accordance with Updated Safety Analysis 2.
204 are 5eismic Class contair.m(ent during normal operations or a Safe Shutdown Earthquake Reprt USAR) Appendix f.
A break in the piping outside of
-is considered an incredible event.
Based on the above information, the valves CH 198, CH 203 and CH 204 are not required to be tested in the-closed direction per ASME Section XI, Subsection IWV.
NRC Question No. 2 Safety Injection Tank check valves $1-207,51-208, 51-211, $1-212,51-215. 51-216, $1-219(SIT)220 are all verified open but are not verified 51-closed.
Iftheydonokallclose,primarypressurecouldoverpressurize the SITS. Why is there no verification for the check valve's closingt OPPD Response Safety injection Tank check valves S1-207, SI-208, 51211, SI 212, SI-215 SI 216, S1219 and $1-220 -are listed in the fort Calhoun Station ISI Program Plan, Revision 5, Table 2.1, Pages 32 and 33.
The Program Plan indicated that the valves were to be " leak tested" which satisfied the
" closed" verification requirement. However OPPD recognized that this was not clearly stated. Therefore, OPPD has ated the official copy of the Fort Calhoun Station ISI Program, Revis on 5 clearly indicate that a closed test is performed (maintained by OPPD) to for the check valves in accordance with the requirements of ASME Section XI, fort Calhoun Station Technical Specifications and NRC Generic Letter 89 04.
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