ML20236R100

Forwards Request for Addl Info Re 870911 Special Rept 87-10 & 851206 & 860306 Submittals.Response Requested within 30 Days of Ltr Receipt

ML20236R100
Person / Time
Site:	Wolf Creek
Issue date:	11/13/1987
From:	Oconnor P Office of Nuclear Reactor Regulation
To:	Withers B WOLF CREEK NUCLEAR OPERATING CORP.
References
NUDOCS 8711230087
Download: ML20236R100 (4)

Text

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Docket No. 50-482 November 113,1987 Mr. Bart D. Withers President 1and Chief Executive Officer Wolf Creek Nuclear Operating Corporation Post Office Box 411

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Burlington, Kansas. 66839

SUBJECT:

' REQUEST FOR ADDITIONAL INFORMATION RELATED TO WOLF CREEK

'SPECIAL REPORT 87-10 t

The staff isLcontinuing its review of your submittals dated December 6,1985 and March 6, 19% , and Special Report 87-10 dated September 11, 1987. .In order to meet our current schedule, we need the_ information requested in the enclosure within-30 days of your; receipt of this letter.

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i The' reporting and/or recordkeeping requirements contained in this letter, j affect fewer than ten respondents; therefore,'0MB clearance is not required under P.L.96-511.

I Sincerely,

/s/

Paul W. O'Connor, Project Manager j Project Directorate - IV (

Division of Reactor Projects - III, .!

IV, V and Special Projects i a

Enclosure:

i As stated cc w/ enclosure: I See next page )

i DISTRIBUTION l fjDocketFiled NRC PDR Local PDR PD4 Reading l

F. Schh eder' P. Noonan P. O'Connor 0GC-Bethesda- i E. Jordan J. Partlow ACRS (10) PD4 Plant File  !

J. Calvo ,

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• See previous concurre ce- "

PD4/LA* -PD4/PM PD4/Dfl%

PNoonan -P0Connor JCalvo 11/10/87 11/p,/87 11/n /87

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8711230087 87'1113  !

PDR ADOCK 05000482 o S PDR

Docket No. 50-482 Mr. Bart D. Withers President and Chief Executive Officer.

Wolf Creek Nuclear Operating Corporation Post Office Box 411 Burlington, Kansas 66839

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION-RELATED TO WOLF CREEK SPECIAL REPORT 87-10 The' staff is continuing 'its review of your submittals dated . December.6,1985 l and March 6, 1985, and Special Report 87-10 dated September 11,L1987. To permit us to continue our review on our current schedule, we require'the information requested in the enclosure to this'. letter.

Please ' provide the requested information within 30 days of-your . receipt of '

this letter.

The reporting and/or recordkeeping requirements contained in this~ letter .

affect fewer than ten respondents; therefore,.0MB-clearance is not' required.

under P.L.96-511.

Sincerely, nl Paul W. O'Connor, Project Manager Project Directorate - IV Division of Reactor Projects - III,

! IV, V and Special Projects 1

Enclosure:

As stated cc w/ enclosure:

See next page DISTRIBUTION Docket File NRC PDR Local PDR PD4 Reading F. Schroeder P. Noonan P. O'Connor OGC-Bethesda E. Jordan J. Partlow ACRS-(10) PD4 Plant File J. Calvo PD4/L PD4/PM( PD4/D PNoon P0Connor JCalvo 11/!0/87 11/10/87 11/ /87 l

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Mr. Bart D. Withers Wolf Creek Generating Station Wolf-Creek Nuclear Operating Corporation Unit No. 1 cc:

Jay Silberg, Esq. ._ Mr. Gerald Allen Shaw, Pittman, Potts & Trowbridge Public Health Physicist 1800 M Street, NW Bureau of Air Quality & Radiation Washington, D.C. 20036 Control Division of Environment-Chris R. Rogers, P.E. Kansas Department of Health' Manager, Electric Department and Environment-Public Service Commission Forbes Field Building 321 P. O. Box 360 Topeka, Kansas 66620 Jefferson City, Missouri 65102 Mr. Gary-Boyer, Plant Manager Regional Administrator, Region III Wolf Creek Nuclear Operating Corp.

U.S. Nuclear Regulatory Commission P. 0. Box 411 799 Roosevelt Road Burlington, Kansas' 66839 Glen Ellyn, Illinois 60137 Regional Administrator,.' Region IV Senior Resident Inspector / Wolf Creek U.S. Nuclear Regulatory Commission c/o V. S. Nuclear _ Regulatory Commission Office of Executive Director:

P. O. Box 311 for Operations .

Burlington, Kansas 66839 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Mr. Robert Elliot, Chief Engineer Utilities Division Mr. Otto Maynard, Manager Licensing Kansas Corporation Commission Wolf Creek Nuclear Operating Corp.

4th Floor - State Office Building . P. O. Box 411 l Topeka, Kansas 66612-1571 Burlington, Kansas 66839 f

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a rs REQUEST FOR INFORMATION ON WOLF CREEK 1 SPECIAL REPORT 87-10 l

1. In the report it is stated that due to physical characteristics of the  !

sheathing filler material and industry standard installation techniques, '

voids up to approximately 15 percent could be expected after the initial filling operation. Describe the physical characteristics and the installa-tion techniques that may result in voids up to 15 percent. ]

2. In the report it is claimed that three additional factors by themselves can contribute to voids more than 15 percent.. Please explain why the i voids in the hoop tendons are less than those in the vertical ones, and j also less than 15%. i i

3. Describe the quality assurance program used during construction for installing the grease in the tendon sheathings, specifically the quality and quantity of the grease installed. <

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4. Discuss the procedure you used in performing the tendon surveillance, d specifically how the grease in the vertical and horizontal sheathings was taken out and reinstalled and quality assurance exercised. What are the sign-off requirements? Do you use a check list?

5. This is the second time that your surveillance program has identified tendons with grease voids that exceeded the tech spec limit. It is important that the root cause of voids be determined. If the root cause is the preexisting voids during the time of construction it is very important that one of the tendons that was refilled during the 1985 surveillance (presumably with the largest void ratio) be reexamined.

6. Provide actual records of how much grease was filled in the ducts with greater than 5% void rates.

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