ML18219D965
| ML18219D965 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 02/28/1977 |
| From: | Maloney G Indiana Michigan Power Co, (Formerly Indiana & Michigan Power Co) |
| To: | Rusche B Office of Nuclear Reactor Regulation |
| References | |
| Download: ML18219D965 (8) | |
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U.S. NUCLEAR BI!GULATOBYCOMMISSION NRC DISTBIBUTIONFoB PART 50 DOCKET MATERIAL DOCKET NUMOF B 50-315 FILE NUMBER TO:
Mr. Benard C. Rusche FROM:
Indiana & Michigan'Power Company New York, N. Y.
G. P. Maloney DATE OF DOCUMENT 2/28/77 DATE RECEIVED 3/2/77 SfLETTER
%ORIGINAL OCOPY DESCRIPTION 0NOTORIZLD
/KUNGLASS IF I E D PROP INPUT FORM ENCLOSURE NUMBER OF COPIES.RECEIVED One signed Ltr. re our 11/23/76 ltr....".trans the following:
Consists of letter from Exxon concerning fission gas release in Exxon Nuclear supplied fuel ~ ~ ~ ~ ~ ~
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SAFETY ASSXGNED AD:
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Donald C. Cook Nucle
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1 Docket No. 50-315 I
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DPR No.
58 February 28"',
1977 Mr. Benard C. Rusche, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
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Dear Mr. Rusche:
In Mr. Dennis L. Ziemann's letter of November 23,
- 1976, which we received on November 29,
- 1976, he requested further information regarding the effect, of high burnup on fission gas release and the impact of increased rod internal pressure on the safety analysis..
We transmitted that letter to Exxon Nuclear Company, Inc. asking that they reply promptly to us for your, category of plants that will reach peak local fuel rod burnups of 20,000 Megawatt days per metric ton of uranium after June 1,
1977.
We estimate that. this burnup of the Exxon Nuclear Company fuel will be achieved in Unit 1 of the.
Donald C. Cook Nuclear plant, during the early portion of our third cycle of operation (2nd cycle for the Exxon fuel).
This will probably be in the first half of 1978.
The attached letter from Exxon, in response to our request indicates the results of calculation'of internal fuel rod pressure in accordance with your request.
Exxon also indicates that they will have completed the balance of the
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M&. Benard C. Rusche February 28, 1977 evaluation as requested by your letter by November 1977.
Very truly yours, P.
Ma ne ice Pre ide GPM:mam Attachment Sworn and subscribed to before me this ZR day of February in New York County, New York Notary Public KATIILEENBARRY)
NOTARY PUSt.lC, State of New )'orfr No. 4I-4606792 Quelified in Queens County "Certificete fifed'in New York County Lqinfnifswn expires March 30, f~
cco G. Charnoff R. C. Callen R. J'. Vollen P.
W. Steketee R. Walsh R. S. Hunter R.
W. Zurgensen Bridgman
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February 22,. 19'l7 P~-
I)oberon Hunter, Vice President,
}>uclear Engineering T>>)>cricau Electric Power
'lw'o Broadway
)(e~: York, Nev York lODD4 BlSDKI". Fission Gas Release in Exxon tluclear supplied Puel-Donald C. Cook Nuclear Plant Unit I POS'erence: letter from D, I. Ziemnn (t>RC) to Vr. John Tfllinghast (Indiana f Nichigan Electric Company) dated b>ver>er 23< l976 Dear Vr. Hunter!
fuel. 5n the (donald C; Cook }tuelear Plant Unit I vill not, reach 20>
}'"lt)/Tprie>r to mid-1978.
Xn res}~'ense to the request by the t)RC (above reference},
the impact. of addit5o>>nl fiosion gas release after 20,000 PAD/le burnup is being, invesli)>au.d for the F>;xon nuclear supplied l5xl5 fuel, & evaluate the fissio)> c)>p,release and the fuel pin internal pressure, the b'RC approved p)CR fuel densification Fardel with modifications to incorporate the fis'-"ion gas rel).afie formula specified in the reference.'letter has been used.
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)Iax$ >:.u>>> 35near heat, generation rate of 13,69 }~M/ft. @as used. in the analysis 45th t}>r. revised release forrrula> a peak pin pressure of 1055 psia is cal-
- culated, as co@pared to ),345 i>sia with the present r>odel.
Ti>e )>~ximnm f5ss5on 9as releafie fraction is calculated to be.24 with t})e revised rmdel con>pared to.05 !>'5th the present noel.
'The v~imum fuel pin pressures at end-of-35fe (ROI} vere found not to exceed the sysMn) operat.ing pressure' E'.xxon llu>.3ear >:i]3 complete its-evaluation as requested in the reference lett.er 4)'oveT>her 1977.
The rsm<im>m exposure in Em(on Nuclear supplied ODD
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Hr, I'.. H. D/i.sch(ngcr si cerely>
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(> y p o (4'sl()y > Vi!ulager Ae.'load hicon);ing AH AFF)t,)AYE OF KYXOM COBPORAT)OM
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