ML20040B737

Interim Deficiency Rept Re Existence of Cracks in Borated Water Storage Tank Foundation.Highest Loaded Bolt Chair Welds of Bolt Chair Passed.Next Rept Expected by 820315

ML20040B737
Person / Time
Site:	Midland
Issue date:	01/18/1982
From:	Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20040B738	List: ML20040B737 ML20040C573
References
10CFR-050.55E, 10CFR-50.55E, 14664, 81-03-#11, 81-3-#11, NUDOCS 8201260372
Download: ML20040B737 (2)

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@ COIISumBIS power co-Vice President - Projects, Engineering and Construction o.n.r. offic : 1945 w.,t pern.is no.a. J.ck,on, ui 4920i. (si7: 7ss-o4sa 81-03 #11 January 18, 1982 t\\

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Mr J G Keppler, Regional Administrator g

US Huclear Regulatory Commission f,

gg, Region III

-9, Glen Ellyn, IL 60137 D

gg0Nb 799 Roosevelt Road

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Ek Dec Mr H R Denton (25) g' Office of Nuclear Reactor Regulation US Nuclear Regulatory Co==ission Washington, DC 20555 MIDLAND PROJECT -

BORATED WATER STORAGE TANK FOUNDATION OL DESIGN CALCULATIONS FILE:

Oh85.16, 0.4.9.h9 SERIAL:

1h66h

References:

J W Cook letters to J G Keppler:

(1) Serial 11201, dated February 20, 1981 (2) Serial 11528, dated April 3,1981 (3) Serial 12015, dated June 10, 1981 (h) Serial 12799, dated June 26, 1981 (5) Serial 13352, dated July 21, 1981 (6) Serial 13653, dated August 28, 1981 (7) Serial lh591, dated October 26, 1981 (8) Serial 14339, dated November 13, 1981 (9) Serial lh902, dated November 2h, 1981 (10) Serial 146h5, dated December 11, 1981 This letter, as were the referenced letters, is an interim 50 55(e) report concerning the existence of cracks in the borated water storage tank foundation. This report gives the results of a BWST finite element analysis performed to verify the integrity of the tanks.

Enclosed is a report prepared by Structural Mechanics Associates (SMA) which describes the finite elpment model and analytical results of the tank evaluation. The tank analysis was limited to tank 1T-60 because it was shown to be the -vorst case condition, and the results did not result in any predicted excessive loading or permanent deformation in the tank walls, bolts or bolt chairs. The report provides the calculated loads and ASME code allowablec used for acceptance criteria.

This report should provide the necessary information for the NRC staff to review and concur with our conclusion that the borated water storage tanks have not been permanently damaged as a result of the ring vall foundation q

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• 2 Serial lh66k 81-03 #11 l

cracking. The report recommends that the highest loaded bolt chair velds be dye penetrant testea The test was performed and all the velds of the bolt chair passed. We plan remedial work to restore the tanks to a level condition and thereby relieve the loads imposed on the tanks due to settlement.

Another 50 55(e) report, either interim or final, vill be submitted on or before March 15, 1982.

See kl dsL JWC/WJC/lr

Enclosure:

" Evaluation o.' Midland Huclear Power Plant Borated Water Storage Tank for Non-Uniform Support Loading Resulting from Ring Wall Settlement" CC: RJCook, Midland Resident Inspector (1)

Document Control Desk, USNBC Washington, DC (1)

Atomie Safety & Licensing Appeal Board, w/o CBechhoefer, ASLB, v/o MMCherry, Esq, w/o FPCowan, ASLB, v/o RSDecker, ASLF, v/o DSHood, USNRC (2)

RHernan, USURC (1)

JHarbour, ASLB, v/o JDKane, USHRC (1)

W0tto, US Army Corps of Engineers, (1)

WHMarshall, v/o FRinaldi, USNRC (1) l HSingh, US Army Corps of Engineers (1)

MSinclair, v/o BStamiris, v/o SJPoulos, Geotech Eng, Inc (1) 1 i

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