ML20235L143

Forwards Request for Addl Info Re 870331 & 0421 Submittals Concerning Uprating Application

ML20235L143
Person / Time
Site:	Callaway
Issue date:	09/28/1987
From:	Alexion T Office of Nuclear Reactor Regulation
To:	Schnell D UNION ELECTRIC CO.
References
NUDOCS 8710050365
Download: ML20235L143 (3)

Text

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SEP 2 81987 Docket No. 50-483 DISTRIBUTION:-

N Uocket Files @

NRC PDR Local PDR PDIII-3 r/f Mr.-Donald F. Schnell D. Wigginton Vice President - Nuclear G. Holahan Union Electric Company P. Kreutzer Post Office Box 149 T. Alexion St. Louis, Missouri 63166 OGC-Bethesda E. Jordan

Dear Mr. Schnell:

J. Partlow ACRS (10)

F. Orr

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING UPRATING APPLICATION The staff is continuing its review of your March 31 and April 21, 1987 submittals

! concerning your uprating application. The staff requests additional information identified in the Enclosure to continue its review.

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This request for information affects fewer than 10 respondents; therefore, OMB clearance is not required under Pub. L.96-511.

Sincerely,

/s/

Thomas W. Alexion, Project Manager l Project Directorate III-3 Division of Reactor Projects

Enclosure:

As stated cc: See next page Office.: LA/PDI)I-3 PM PD14 -

PD/PDIII-3 Surname: PKpputzer TA1 tg F0rr1' DWigginton Date: y 09Tg/87 09 87 09/zf/87 09gl/87 l

8710050365 870928 DR ADOCK O 4y3

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, i Mr. D. F. Schnell- Callaway Plant Union Electric Company! Unit No. 1 i

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Dr. J. O. Cermack Mr. Bart D. Withers CFA Inc. President and Chief 4 Professional Dr., Suite 110 Executive Officer Gaithersburg, MD 20879 Wolf Creek Nuclear Operating Corporation Gerald Ch moff, Esq. P. 0.' Sox'411 Thomas A. Baxter, Esq. Burlington, Kansas 66839

, Shaw, Pittman, Potts & Trowbridge l 2300 N Street, N. W. Mr. Dan I. Bolef, President Washingtt'i, D. C. 20037 Kay Drey, Representative Board of. Directors Coalition e Mr. T. P. Sharkey . for.the Environment Supervisor, Compliance ', . % d. outs Region i ,

Union Electric Company 426'j0(haar Boulevard s Post Office Box 620 Univn sity City, Missouri 63130 '

l Fulton, Missouri 65251 '

U. S. Nuclear Regulatory Commission l Resident Inspectors Office -

RRf1 Steedman, Missouri 65077' " ,

, >1 Mr. Alan C. Passwater, Manager Licensing and Fuels -

r Union Electric Company ,

Post Office Box M9  !

St. Louis, Missouri 63166 (

4 r Manager - Eledtric Department Missouri Public Se yice Cossnissia,n

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nPosi,0ffice Box ~ 360 e .

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! , i Mr. Ronald A. Kuct.'r a, Deputy Director 0 Dep4tment of Nah ral Resources .

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l REQUEST FOR ADDITIONAL INFORMATION

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POWER UPRATING CALLAWAY PLANT, UNIT 1  !

DOCKET NO. 50-483 l

1. It is not clear from the March 31, 1987 submittal (ULNRC-1471) that the discrepancy between maximum warranted turbine output (3562 MWt) at Callaway and the requested uprated NSSS license power (3579 MWt) would not impact safety. Explain why disparate power levels would not be encountered which might increase the likelihood of challenges to safety systems.

2. It is not clear that ell FSAR Chapter 15 events have been reanalyzed at the requested uprated power plus uncertainty (2%). It should be explicitly stated that all Chapter 15 events were reanalyzed for this power (3651 MWt),

with any exceptions identified and justified.

3. It is not clear that all reanalyses at the requested uprated power (plus 2%)

have addressed the impact of Vantage 5 fuel. All cases not reanalyzed should be identified, with explicit jusi.ification by reference or explanation '

for each case.

4. It is not clear that the basis for determining auxiliary feedwater (AFW) minimum flow requirement has considered operation at 3579 MWt. If original AFWsizinganalysesasstmadatleast3579MWt(plus2%),thisshouldbe explicitly stated and referenced. If the AFW sizing basis was reanalyzed for the uprated power, this should be stated and justification should be provided to show that identification of the limiting event had not changed as a result cf the higher power or any changes in analytical technique.

5. Justificationfortheoverpressureprotection(safetyvalvesizing)et Callaway for 3425 MWt operation was given by reference to the analyses presented in WCAP-7769. Applicability of WCAP-7769 does not extend above 102%of3423MWt(Ref.WCAP-7769,Section3.1.1). Callaway overpressure protection for operation at 3579 MWt should be justified with analyses performed for the uprated power. The justification should consider changes in fuel design and analytical technique.

6. Identify provisions at Callaway to address potential rod withdrawal events during mode 4 operation.

7. Discuss Callaway near term (interim) and long term (commitments) provisions to address loss-of-coolant accidents during mode 4 operation.

8. In a similar plant uprating, another Westinghouse Plant (North Anna) required about 20 technical specification changes to accommodate the change to a higher power. TheCallawaysubmittal(ULNRC-1471)listsonlyaboutfour, most of them clerical; and the pages don't seem consistent with corresponding technical specification pages of the Callaway reload submittal (ULNRC-1470).

Provide additional documentation to identify and justify all technical (

s) edification changes needed to accommodate the power uprating; those l c1anges which were previously made for the Vantage 5 reload but also needed i for uprating should be included and justified by reference.

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