ML20003B082
| ML20003B082 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 02/02/1981 |
| From: | Linder F DAIRYLAND POWER COOPERATIVE |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20003B083 | List: |
| References | |
| TASK-02-04, TASK-03-06, TASK-2-4, TASK-RR LAC-7355, NUDOCS 8102100331 | |
| Download: ML20003B082 (2) | |
Text
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D DA/RYLAND COOPERAT/VE eo Box sir. 2eis eAsr Av sours. LA caosse.wiscossin vso, (608) 788 4000 February 2, 1981 In reply, please refer to IAC-7355 DOCKET NO. 50-409 Si /(p' /
Director of Nuclear Reactor Regulation ATTN:
Mr. Dennis M. Crutchfield, Chief N
Operating Reactors Branch No. 5
'(1 Division of Operating Reactors L
T, U.
S. Nuclear Regulatory Commission 6'-
0 0 3
Washington, D. C.
20555
[EB f j ?",* f
SUBJECT:
DAIRYLAND POWER COOPERATIVE gf
/,y LA CROSSE BOILING PATER REACTOR (LACBWR)
PROVISIONAL OPERATING LICENSE NO. DPR-45 N
s#
6 LIQUEFACTION POTENTIAL & SEISMIC ANALYSIS AT (SEP TOPICS II-4 AND III-6) - DESIGN DETAILS FOR ALTERNATE SAFE SHUTDOWN SYSTFM
Reference:
(1)
DPC Letter, Linder to Crutchfield, LAC-7246, dated Noverber 26, 1980.
Gentlemen:
Our letter (Peference 1) discussed the preliminary design, schedule, and final design of a dedicated safe shutdown system which would preclude reliance on the Crib House and buried piping in the event of an SSE.
Enclosed as Attachment 1 is a detailed design description of the Emergency Service Fater Supply System dated January 23, 1981, which describes the ccmponents, physical arrangement, installation require-ments, and deployment of the system.
It is our opinion that the above information will show that the ESWSS is a suitable remedial solution for mitigating the potential conse-quences due to the loss of critical Crib House water' supply services as addressed in the NES Peport No. 81A0039 transmitted to you earlier by Reference 1.
Since the transmittal of our letter (Reference 1), additional changes have been incorporated in our preliminary design which are reflected in the enclosed attachment.
Briefly, these changes consist of utilizing an existing spare 2" High Pressure Service Water line tap for the cross-tie to the tube side of the CCW coolers.
Also, the flow path of the FSWSS inlets has been improved in order to enhance the 8102100 5 4 i
[
Mr. Dennis M. Crutchfield, Chief LAC-7355 Operating Reactors Branch No. 5 February 2, 1981 rechanical hydraulic quality of the inlets and to minimize flow path disturbances to the existing in-plant HPSW/ACS systems.
Reduction of the CCW tie line to 2" still allows for a 200 GPM capacity and if deemed necessary, an existing 1 " hose tie is available.
Presently, all of the necessary HPSW/ESWSS isolation valves, HPSW piping modifications, 2" tap into the LPSF inlet to the CCW coolers, and the inlet isolation valve for the FSWSS header inlets have been installed.
Purchase orders have been issued for the pumps, hoses, distributor, hose fittings, strainers, and other miscellaneous components to place the system into operation.
Installation of the remaining piping, fittings, and valves for the FSWSS inlet header is in progress and should be completed before or during the second week in February, 1981, at which time we anticipate completing receipt of the pumps and hoses.
Based on progress thus far, we estimate that the syster will be operational on February 25, 1981.
In order t.o optimize the anticipated abilities of the FSMSS as pre-sented in our attached design, prededication testing of the system will be necessary which will enable us to expand the details for the deployrent and operational procedures.
Also, additional tire is necessary to properly prepare the proposed Technical Specifications which we expect to submit on or before February 9, 1981.
If there are any questions regarding this subrittal, please contact us.
Very truly yours, DAIRYLAND POWER COOPERATIVF Frank Linder, General Manager FL:DR:af cc:
J. G.
Keppler, Reg. Dir., NPC-DPO III NRC Resident Inspectors