ML20065K044
| ML20065K044 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 09/29/1982 |
| From: | Baynard P FLORIDA POWER CORP. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-B-24, REF-GTECI-ES, RTR-NUREG-0737, RTR-NUREG-737, TASK-2.E.4.2, TASK-B-24, TASK-B-24-.2, TASK-OR, TASK-TM 3F-0982-20, 3F-982-20, NUDOCS 8210060263 | |
| Download: ML20065K044 (2) | |
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Power COAPGA&FeON September 29,1982
- 3F-0982-20 File: 3-0-26 Mr. John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Crystal River Unit 3 Docket No. 50-302 Operating License No DPR-72 NUREG-0737, Item II.E.4.2 and Generic Item B-24 Containment Purging Duration
Dear Mr. Stolz:
In our letter dated July 26, 1982, Flcrida Power Corporation (FPC) committed to propose a yearly goal for containment purging time based on data collected during a 30-day test period which began on July 23, 1932. The primary results of the test are as follows:
1.
The concentration of iodine 131 peaked at four (4) times the Maximum Permissible Concentration at the two week point.
2.
Noble gas activity peaked at nearly one hundred (100) times the original baseline activity. This resulted in a beta submersion exposure increase from approximately 2 mrem /hr to 94 mrem /hr two weeks into the test.
3.
An entry into the containment during the test period was required.
d[
Fourteen hours were required to accomplish a nominal six hour I
maintenance task. Because of the high airborne activity, ten workers OTC were needed to do the same job that normally requires three workers.
In addition the workers were subjected to ambient dry bulb air temperatures of 1040F versus the normal 900F temperatures.
4.
At the conclusion of the test period, purging was reestablished, and samples were drawn to determine total cleanup time.
The reactor building reached, essentially, baseline values in approximately 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
. 8210060263 820V29 I PDR ADOCK 05000302 i _!'
PDR General Office 3201 inirty-fourtn street soutn. P O Box 14042, st Petersburg. Florida 33733 e 813-866-5151 I
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Mr. John F. Stolz September 29,1982 Page 2 In accordance with the test results as summarized above, FPC hereby proposes to limit purging operations to 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> per year. This number assumes 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> of purge time every two weeks to allow for the regularly scheduled bi-weekly containment entry (1250 hours0.0145 days <br />0.347 hours <br />0.00207 weeks <br />4.75625e-4 months <br /> per year plus a 250 hour0.00289 days <br />0.0694 hours <br />4.133598e-4 weeks <br />9.5125e-5 months <br /> per year allowance for operational contingencies).
This number only assumes negligible increases in reactor coolant system leaks and failed fuel.
Until such time that your concurrance to our proposed purging limit (1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> per year) is gained, we will continue to use purging as an available option. We do not intend to purge continuously but will use purging as a means to maintain a reasonable containment atmosphere. Within a reasonable period upon resolution of this issue, we will implement administrative controls (i.e., procedures) to track yearly purge times.
A related issue involves the proposed installation of debris screens on the inner-side of the inboard purge valves. FPC originally intended to submit design and installation schedules by August 31, 1982 (reference our letter dated July 8,1982). These schedules were not submitted due to ongoing verbal discussions with your office regarding the continued use of purging due to valve performance under LOCA induced loadings. Therefore, FPC will temporarily hold this issue in abeyance. We will continue our dialogue regarding installation of debris screens until concurrence is reached on the continued availability of purging during Modes 1-4.
Very truly yours, A
V Dr. Patsy Y. Baynard Assistant to Vice President Nuclear Operations KP/myf cc:
Mr. J.P. O'Reilly Regional Administrator Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission 101 Marietta Steet, Suite 3100 Atlanta, GA 30303