ML20062D601
| ML20062D601 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 11/20/1978 |
| From: | Linder F DAIRYLAND POWER COOPERATIVE |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| TASK-09-01, TASK-9-1, TASK-RR LAC-6004, NUDOCS 7811270109 | |
| Download: ML20062D601 (3) | |
Text
DAIIt)LtND POWEft COOPEIRATIVE Sa Groue, Olbconsin 54601 November 20, 1978 In reply, please refer to LAC-6004 m
DOCKET NO 50-409 Director of Nuclear Reactor Regulation
' ~ '
U.
S. Nuclear Regulatory Commission
(
Washington, D.
C.
20555 t
SUBJECT:
DAIRYLAND PONER COOPERATIVE LA CROSSE BOILING WATER REACTOR (LACBWR) \\.1)
PROVISIONAL OPERATING LICENSE NO. DPR-45 PROPOSED MODIFICATION - SPENT FUEL STORAGE
References:
(1) NRC Letter, Ziemann to Madgett, dated September 28, 1978.
(2) DPC Letter, LAC-5519, Madgett to Director of Nuclear Reactor Regulation, dated October 26, 1978.
Gentlemen:
Enclosed with this letter is a response to Question No. 9 of - Questions for the La Crosse Spent Fuel Pool Mod-ification submitted to us by Reference (1).
Responses to other questions contained in the enclosure were previously submitted to you by Reference (2).
If there are any questions concerning this submittal, picase l
contact us.
l Very truly yours, l
DAIRYLAND POWER COOPERATIVE Frank Linder, General Manager l
FL:NLH:af cc:
(See attached list).
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.s Director of Nuclear Reactor Regulation LAC-6004 Washington, D.
C.
20555 November 20, 1978 cc:
J. G. Keppler, Regional Director U. S.
Nuclear Regulatory Commission Directorate of Regulatory Operations Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Charles Bechhoefer, Esq., Chairman Atomic Safety and Licensing Board Panel U. S. Nuclear Regulatory Commission Washington, D.
C.
20555 Mr. Ralph S. Decker Route 4 Box 190D Cambridge, MD 21613 Dr. George C. Anderson Department of Oceanography University of Washington Seattle, Washington 98195 O.
S.
Hiestand, Jr.
Attorney at Law Morgan, Lewis & Bockius 1800 M Street, M. W.
Washington, D.
C.
20036 Kevin P. Gallen Attorney at Law Morgan, Lewis & Bockius 1800 M Street, N. W.
Washington, D.
C.
20036 Coulee Region Energy Coalition P. O. Box 1583 La Crosse, WI 54601 1
NRC CUESTION 9.
Provide a discussion of the impact of the pool modification on pool teakage.
Include in your discussion the pool leak-age at different heights of uater in the pool, the leakage e=pected after the pool modification and the capability of the radcasta system to process this uater.
DPC RESPONSE:
The impact of the pool modification on pool leakage is acceptable.
By actual measuretants of elapsed time during a given change in storage pool water level, leak rates were calculated with the water level at elevation 680 feet MSL (present water level) and at elevation 700 feet MSL (maximum water level).
The respective leakage rates were determined to be 5.6 gallons per hour and 11.1 gallons per hour.
No increase in the leak rate of the fuel storage pool is antici-pated for the next 4-5 years since the lower tier storage racks would provide sufficient storage capacity during that period of time.
When the upper tier is installed and used for storage of irrad-iated fuel, it is anticipated that the pool water level will be raised sufficiently to provide shielding above the top of the tier.
It is estimated that this increase in water level may be approximately 15 feet above the present normal water level.
The leak rate then would be expected to be 7-10 gallons per hour.
Water leaking from the pool is only noderately contaminated.
This leakage contributes less than 10S of the monthly average volume of licuid rad waste processed.
An increased leak rate from the storage pool as the result of a higher water level will not reduce the capability of the radwaste system to process the water.