ML20062D579
| ML20062D579 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 10/30/1978 |
| From: | Madgett J DAIRYLAND POWER COOPERATIVE |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| LAC-5524, NUDOCS 7811240233 | |
| Download: ML20062D579 (2) | |
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DAIItYLA.YD POWEN C001*ENATIVE Ba Grone, GLonan 54601 October 30, 1978 In reply, please refer to LAC-5524 DOCKET NO. 50-409 Mr. James G.
Keppler Regional Director U. S. Nuclear Regulatory Commission Directorate of Regulatory Operations Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137
SUBJECT:
DAIRYLAND POWER COOPERATIVE LA CROSSE BOILING WATER REACTOR (LACBWR)
PROVISIONAL OPERATING LICENSE NO. DPR-45 REPORTABLE OCCURRENCE NO. 78-11
Reference:
(1) LACBWR Technical Specifications, Section 3. 9. 2.a. (3).
(2) LACBWR Technical Specifications, Section 5. 2.1.1. (b).
Dear Mr. Keppler:
In accordance with Reference 1, this is to inform you of abnormal degradation discovered in the primary reactor containment during periodic Type A surveillance leakage rate testing.
i As a result of conducting a periodic Type A leak test on the LACBWR primary reactor containment, the measured leakage rate (Lam ) was determined to exceed the maximum allowable test leakage rate of 0.1 percent per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at the test pressure of 52 psig as defined in Reference 2.
The measured leakage rate was determined to be 0.10023% per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> including a calculated instrument error of 0.00675% per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
The leakage rate data used to formulate the finding was collected during the hours of 1000 and 2400 on October 29, 1978.
During this period of time, the ventilation discharge dampers were isolated due to excessive leakage.
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- Excluding ventilation discharge damper leakage. _gg7g P
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I Mr. James G.
Keppler LAC-5524 U. S. Nuclear Regulatory Commission October 30, 1978 i
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Prompt notification of the test results to the U. S. Nuclear Regulatory Commission was made to Mr. Luis Reyes at 2400 hours0.0278 days <br />0.667 hours <br />0.00397 weeks <br />9.132e-4 months <br />, October 29, 1978.
j Repair work, as required, will be accomplished following depressur-ization of the primary reactor containment.
Upon completion of j
preparations within a few days, the Type A test will be repeated.
If there are any questions concerning this notification, please i
Contact us.
e Very truly yours, DAIRYLAND POWER COOPERATIVE b
di s
John P. Madgett, General Manager JPM:RES:af cc:
Director, Office of Management Information and (2)
Program Control 1
l U. S. Nuclear Regulatory Commission l
Washington, D. C.
20555 1
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