ML20055E033
| ML20055E033 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 07/02/1990 |
| From: | Crawford A PUBLIC SERVICE CO. OF COLORADO |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| P-90212, NUDOCS 9007100298 | |
| Download: ML20055E033 (2) | |
Text
4 7o..
Public Service'
%th, P.O. Box 840 Denver CO 80201 0840 July 2, 1990 y$;,D,$,[n',8#'d Fort St. Vrain Nacieet operations Unit No. 1 P-90212 U. S. Nuclear Regulatory Commission ATTN:
Document Control Desk Washington, D.C.
20555 Attention: Mr. Seymour H. Weiss, Director Non-Power Reactor, Decommissioning and Environmental Project Directorate Docket No. 50-267
SUBJECT:
'B' Heliurr Circulator Removal
REFERENCES:
1.
NRC
- Letter, Weiss to Crawford, dated 6/21/90 (G-90144) 2.
- Letter, Crawford to Weiss, dated 5/22/90 (P-90159)
Dear Mr. Weiss:
Public Service Company of Colorado (PSC) is planning to remove the
'B' helium circulator from the Fort St.
Vrain (FSV) prestressed concrete reactor vessel (PCRV) in a manner similar to previous circulator maintenance outages.
The NRC providad guidance for circulator removal in Reference 1,
and at the present time, PSC agrees to wait for a possession-only license before removing both Loop I helium circulators.
However, we consider that removal of a single helium circulator can be safely undertaken in accordance with existing requirements.
The
'B' helium circulator is in primary coolant Loop I which, as indicated in Reference 2, is not needed to maintain required core conditions during shutdown and defueling.
'B' helium circulator's helium actuated shutdown seal system has a leak.
This leak does not affect the shutdown seal's ability to maintain the primary seal, but the leakage of clean helium through the actuation system is an economic consideration for PSC.
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l P-90212 P
Page 2 L
July 2, 1990 I
PSC plans to remove the
'B' helium circulator using equipment, l
procedures, and the same process as previous circulator maintenance L
outages, except that we do not plan to reinstall a helium circulator I
in the PCRV penetration. The PCRV penetration will be sealed with i
the previously. utilized special ball valve device during actual 1
(I '
circulator removal operations, and with a pressure sealing device at other times.
The removed helium circulator will be stored on-site, until receipt of Fort St. Vrain's possession-only license, This specific helium circulator maintenance activity description is g
being submitted as discussed between Mr. H. L. Beey (PSC) and Mr.
S.
i H. Weiss (NRC) on June 26, 1990.
PSC considers that this maintenance activity should be undertaken similar to past circulator maintenance activities.
We are planning to begin circulator removal activities
.before mid-July.
Accordingly, PSC requests timely acknowledgement ~of NRC concurrence with this undertaking.
If you have any questions regarding this request, please contact Mr.
M. H. Holmes at (303) 480-6960.
Very' truly yours, f..
A. Clegg Crawford Vice President Nuclear Operations ACC/SWC/imb cc:
Regional Administrator,. Region IV ATTN: Mr. J. B. Baird Technical Assistant Division of Reactor Projects Mr. Robert Farrell Senior Resident Inspector Fort St.. Vrain
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