ML20037B259
| ML20037B259 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 11/29/1971 |
| From: | Skovholt D US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Stiede W COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8009100750 | |
| Download: ML20037B259 (1) | |
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Docket File f DR Reading.
NOV 2 91971 i-DP1 Reading Branch Reading 1-l CO (2)
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0C Loc-ct No. 55--10
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DJSkovholt, DRL h
DLZiemann, DRL h
RDSilver, DRL Com:aonwcalth Edison Company R'4Diggs ' DRL ATT3.
Lr. 'Jayne L. Stiede l
ACRS (3) p Nuclear Licensing Administrator 72 West Adc=s Street 0
Cuicago, Illinois 60690 I
Gentlemen.
i T.ie Co=aission is developing fracture toughness and natorials surveillance progras criteria for reactor vessel catcrial (;roposed e.rpendices G and li of 10 CFR Part 50). The results of the surveillance eill provide I
infornation necessary to ceternine operating conditions under which the reactor vessel can be operated with adequate cargin of safety againct i.
fracture.
To update the evaluation of your reactor vcf.a ul and assura that the best available information is incorporated, you are requested
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to provide the following information uithin 60 days.
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!. calculation of the Dresden 1 vessel vall bcitline flu:: by l
to' days calculational techniques to provide a cct; crison of
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taese results with both tuo tecsured values airl the previously !
calculated values given in the two General Electric reportc l
on the Dresden 1 reactor vessel surveillanca pro;;ran.
The tvo j
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General Electric reports are heferences 16 auc 19 of Cnarter 4
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Page 206 of ASTH Special Technical Publication 45.
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The prediction of the current level of neutren fluence. et the reactor vessel wall beltline, and the lima.tations of tae fluence en operating licitations (hcatup and cooldoan), as well as on j-continued operation.
1 Sincerely i
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Donald J. Skovholt 1
Assistant Eirector for Reactor Operations Division of Reactor Licensing p
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