ML19351F160
| ML19351F160 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 12/19/1980 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Wuller G ILLINOIS POWER CO. |
| References | |
| NUDOCS 8101100018 | |
| Download: ML19351F160 (3) | |
Text
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~1 DEC 1 9 1980 q
Docket lios. : 50-461/462 id 3
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!!r. G. E. Wuller Supervisor - Licensing Illinois Power Cocpany 500 South 27th Street Decatur, Illinois 62525
Dear !!r. Wuller:
SUBJECT:
ULTI!! ATE CAPACITY ANALYSES OF IMRK III C0tiTAIUMEliTS - CLIllTON As part of the staff's generic review of the effects of hydrogen evolving fror.1 a postulated accident, all applicants who have either an ice condenser or Mark III pressure-suppression containment design are being requested to perform an ultimate capacity analysis for the containment.
Since the Clinton Power Station utilizes the Mark III containment design, we request that you perform such an analysis, as described in the enclosure.
He further request that, within 30 days of your receipt of this letter, you identify the schedule by which the results of this analysis will be sulcitted to the staff.
Sincerely, Robert L. Tedesco, Assistant Director l
for Licensing Division of Licensing
Enclosure:
Uttimate capacity Analyses of Ice Condenser and Mark III Containments cc: See next page.
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ULTIMATE CAPACITY. ANALYSES OF ICE i1NDENSER AND MARK III C0tiTAlliMENTS Detailed analyses are to be performed to assess the effect on containment integrity of a potential hdyrogen burn. Ultimate capacity of the contain-ment should be evaluated using a finite element model. Uniform static pressure capability should be calculated. Dynamic local and overall pressure cabability should also be assessed. Based on the actual materia'-
strength variations indicated by mill test certificates and other uncertainties, the mean, an estimate of dispersion, and lower and upper bounds of the containment capacity should be established. The details of the analyses and the results should be submitted in report form.
The following information should be readily identifiable in the report:
1.
Design pressure; 2.
Calculated static pressure retaining capacity; 3.
Calculated dynamic pressure strength considering appropriate pressure time histories; 4.
The associated failure modes (axisymmetric burst pressure, buckling, rebar yielding, penetration failure, closure failure, or others);
5.
The criteria governing the original design and the criteria used to establish failure; 6
Analysis details and general results; and 7.
Appropriate engineering drawings adequate to allow verification of modeling and evaluation of analyses employed for penetrations.
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