ML20006F493
| ML20006F493 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 02/23/1990 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20006F492 | List: |
| References | |
| NUDOCS 9002280089 | |
| Download: ML20006F493 (2) | |
Text
.
.. s i-UNITED STATES 8'
- NUCLEAR REGULATORY COMMISSION n
if f-WASHINGTON. D. C. 20555 a
- V, b_
SAFETY EVALUATION BY THE OFFICE OF Hl1 CLEAR REACTOR REGULATION f
RELATED TO CLASS C STORAGE ENVIRONMENT FOR SORBENT CANISTERS AT V0GTLE ELECTRIC GENERATIhG PLANT, UNIT 1 L
DOCKET NO. 50-424 INTRODUCTION -
L Cy wbmittal dated Septenber 28, 1989, Georgia Power Company, et al. (the L
licensee) requested an amendnent to the exemption granted October 27,1988, to allow MSA GMR-1 canisters to be stomd in a Class C storage environment versus L
' a Class A storage environtent as defined in ANSI N45.2.2.
L L
EVALUATION The licensee's submittal provided a letter from the Mine Safety Appliances Company (MSA) which contains a sumary of test results which form the basis for MSA and the licensee's conclusion that Class C storage is acceptable.
The test summary discussed accelerated storage tests, Class B storage tests, and a moisture permeation study of the bottom seal.
The accelerated storage tests consisted of 24 canisters after 4 months' storage being exposed to a 10 ppm methyliodide concentration for 480 minutes, three canisters after 6 months' storage being exposed to a 5 ppm methyliodide concentration for 480 minutes, and one canister after 1 year's storage being exposed to en 8 ppm methyliodide concentration for 480 minutes.
In all _ cases,
methyliodide penetration was below 0.5%.
In addition, the three canisters tested after 6 months' storage had their testing continued to a 1% break-through of methyliodide.
The average time to a 1% breakthrough was 44 hours5.092593e-4 days <br />0.0122 hours <br />7.275132e-5 weeks <br />1.6742e-5 months <br />.
The Class B storage tests consisted of sanples drawn at 3-and 4-year storage intervals and tested. Test penetrations were at or. below initial inspection results for the canister lot.
The.noisture permeation study on the canister bottom seal was conducted at 100'F and 100% relative humidity.
MSA found the moisture incursion to be insigni ficant.
The EC staff _has reviewed the inforsation submitted by the licensee and
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concludes that Class C storage is acceptable.
_ Principal Contributor:
Jon B. Hopkins, PDII-3/NRR Deted: February 23, 1990 90022800a9 900223 gDR ADOCK 03000424 kf PLC 3
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14-H-25 T. Reed 14-H-25 0GC 15-B-18 E. Jordan MNBB-3302 G. Hall (4 qvs for each Docket No.)
PI-137 ACRS (10)
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17-F. ARM /LFMB AR-2015
.V0GTLE PLANT File l-
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