ML20012E316
| ML20012E316 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 03/27/1990 |
| From: | Pickett D Office of Nuclear Reactor Regulation |
| To: | Withers B WOLF CREEK NUCLEAR OPERATING CORP. |
| References | |
| TAC-73099, NUDOCS 9004030210 | |
| Download: ML20012E316 (4) | |
Text
e-!~.. c, Mar:h 27, 1990
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i fi Docket No. 50 482 i'
Mr. Bart D. Withers-
~ President and Chief Executive Officer Wolf Creek Nuclear Operating Corporation Post Office Box 411 Burlington, Kansas. 66839
Dear Mr. Withers:
]
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING SEISMIC DESIGN CONSIDERATION FOR SAFETY.RELATED VERTICAL STEEL l
TANKS (TACNO.73099)
)
The staff is continuing its review of your September 22, 1989 letter concerning the seismic design considerations for the refueling water storage tank. Following the audit of the Bechtel calculations on February 14, 1990, 2
the staff requests additional information identified in the enclosure to continue its review. You are requested to respond to the enclosure within 90 days following receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
Sincerely,
/s/
Douglas V. Pickett, Project Manager Project Directorate IV Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
See next page DISTRIBUTION:
Ibsehe44 Net F. Hebdon 000 NRC & Local PDRs P. Noonan E. Jordan PD4 Reading D. Pickett ACRS (10)
G. Holahan G. Bagchi PD Plant File OFC
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OFFICIAL RECORD COPY fg{
Document Name: WC LTR/73099 D
9004030210 900327
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Docket No. 50-482 '
f Mr. Bart D. Withers
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. President and Chief Executive Officer L
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Wolf Creek Nuclear Operating Corporation i
. Post Office Box 411 b
Burlington, Kansas 66839
Dear Mr. Withers:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING SEISMIC DESIGN CONSIDERATION FOR SAFETY-RELATED VERTICAL STEEL TANKS (TACNO.73099)
The staff is continuing its review of your September 22, 1989 letter concerning the seismic design considerations for the refueling water storage tank. Following the audit of the Bechtel calculations on February 14, 1990, the staff requests additional information identified in the enclosure to continue its review. You are requested to respond to the enclosure within
'90 days following receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter-affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
Sincerely, v N1M g
Douglas V. Pickett, Project Manager i
Project Directorate IV 1
Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation
Enclosure:
j As stated 1
cc w/ enclosure:
See next page l
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I
.o t
i Mr. Bart D. Withers Wolf Creek Generating Stetion l
Wolf Creek Nuclear Operating Corporation Unit No. 1 cc' Jay Silberg, Esq.
Mr. Gerald Allen Shaw, Pittman, Potts & Trowbridge Public Health Physicist I
1800 M Street, tN Eureau of Air Quality & Radiation Fathington, D.C.
20036 Control Division of Environr.ent Chris R. Rogers P.E.
Kansas Dcpartment of Heelth Mar.ager,ElectrIcDepartment and Environrent h.blic Servict Cor.snission Forbes field Building 301 F. O. Box 360 Topeka, Kansas 66620 Jefferson City, Missouri 65102 Mr. Gary Boyer, Plant Paneg(r Regienel /,drcinistrator, Region III Wolf Creek Nuc1cer Operating Corp.
U.S. Nuclear Reguletory Ccn.ission P. O. Bcx 411 799 Pecsevcit Read Burliristen, Kansas 6ES39 L
Glu. E11)r., 1111ccir (C137 Regich61 Adrir.istratet, Rcgitt. IV Fenicr Fe!ident Inspector / Wolf Crcck U.S. I;ucleer Ptgulatcry Cona.issier c/c U. S. huclear Reguletcry Ccu.issicn Office ef. Executive Director P. O. Box 311 for Operations Burlington, Kansas 6CB39 611'Ryan Fle:a Drive, Suite 1000 l
t.rlington, Texas 76011 f.'r Rotert Elliot, Chief Engineer Utilities Lisititt Pr. Otto I;cyr.trd,l'rrecer Kct:str Corporaticr. Consission Ptgelticry tus f(cr 4th F1ccr - State Office Buildir.g Wolf Creek Nuclear Operatirip Ocrp.
Tercke., Kansas 66612-1571 P. C. Lox 411 Burlington, Kansas 66839 Office of the Governer i
Stetc of Kansas Topeka, Kansas 66612 l
Attorr.ey Ceneral Ist floor - The Statehcuse Topeka, Kansas 66612 Chairn.ar., Coffey County Commission l-Coffey County Courthouse Purlir.stcr., Kcnses 66839 l
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.e ENCLOSURE i
l REQUEST FOR ADDITIONAL INFORMATION i
REANALYSIS Of VERTICAL STEEL TA!!KS s
WOLF CREEK GEllEP.ATitiG STATION d
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1, During the audit, it was discovered that the forces and stresses on the roof angle connecting the cylinder and the roof under the postulated seismic loadings were not available.
Hence the adequacy of the angle and the angle welds could not be verified.
Provide information (sumarize i
results) related to the adequacy of the connection under the postulated seismic loads.
2.
During the audit, it was discovered that the conclusion of 'no tension" in'any part of the tant anchor bolts and foundation was based on the use 1
of an AISI formula which the staff considers inappropriate.
Provide information (sumarize results) regarding the adequacy of the affected tank areas under the pcstulated scismic loadings. Specifically, the following items should be included:
a.
Adequacy of the anchor bolts and the bolt lugs (or chairs).
b.
Adequacy of the tank shell in tension and compression.
c.
Stresses in foundation media and the adequacy of the reinforced-concrete section under the sump.
d.
Potential for overturning of the tank and the foundation.
e.
Potential for sliding of the tank and the foundation.
The method of combining the respcnses of the three components of the postulated earthquakes should be in accordance with the FSAR commitment.