ML19261C852
| ML19261C852 | |
| Person / Time | |
|---|---|
| Issue date: | 03/15/1979 |
| From: | Parr O Office of Nuclear Reactor Regulation |
| To: | Sherwood G GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 7904190117 | |
| Download: ML19261C852 (3) | |
Text
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UNITED STATES
'4 NUCLEAR REGULATORY COMMISSION j
W ASHINGTON, D. C. 20555 MAR 1 5 1979 Central Files - Topical Reports Dr. G. G. Sherwood, Manager Safety and Licensing General Electric Company 175 Curtner Avenue San Jose, California 95125
Dear Dr. Sherwood:
SUBJECT:
GENERAL ELECTRIC TOPICAL REPORT, NEDE-21056-1-P "N66 SJAE OFF-GAS TREATMENT SYSTEM" We have reviewed the subject topical report and find that we need additional information to complete our review.
Our requests for additional information are enclosed.
Please inform us of the date by which you will be able to provide the requested information.
Sincerely, (14 19. fw Olan D. Parr, Chief Light Water Reactors Branch No. 3 Division of Project Management
Enclosure:
Request for Additional Information cc w/ enclosure:
Mr. L. Gifford General Electric Company 4720 Montgomery Lane Bethesda, Maryland 20014 7904190tG
REQUEST FOR ADDITIONAL INFORMATION 311.0 ACCIDENT ANALYSIS BRANCH In response to Question No. 311.4, NED0-20375 wa; submitted.
Several of the questf ons below refer to NED0-20375.
311.7 Identify the column of atmospheric dispersion ' actors from Table 3 of NED0-20375 which was used in the calculation of the consequence values presented in Tables 9 through 17 of NEDO-20375.
311.8 Justify why Case 5 of NED0-20375 is evaluated using the annual average release rate of 100,000 pCi/sec at 30 min. decay and not at the spike level of 350,000 pCi at 30 min. decay.
311.9 Case 5 may not be conservative. The discussions in NED0-20375 and NEDE-21056 indicate that the release from the SJAEs is equivalent to 100,000 uCi/sec at 30 min. decay.
If this is correct, consequences may be understated since a release from the SJAEs will have little, if any, decay.
Clarify this point.
s 311.10 Identify the assumed accident break or release locations for Cases 1 through 4 of NED0-20375.
311.11 Identify the instrumentation on the off-gas system which will be used to isolata
.. system components and terminate the release of radioactivity to the environment (in particular, to terminate the release from the SJAEs).
Include the response time 23r actuation of the instruments and the estimated time to component isolation (if isolation is proposed).
- - 311.12 Majority of the release and subsequent dose occurs as a result of assuming the SJAE operates for a period of 30 minutes before operator action begins.
Describe the time required for isolation of the SJAEs in the event of a rupture in the delay liae and the necessary automatic and/or operator actions to achieve isolation.
Include discussion of any safe shutdown or operational problems which might arise as a result of SJAE isolation.