ML19319B536
| ML19319B536 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 01/31/1972 |
| From: | Deyoung R US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Sampson G TOLEDO EDISON CO. |
| References | |
| NUDOCS 8001270071 | |
| Download: ML19319B536 (3) | |
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DISTRIBUTION:
Docket 4 DRL Reading PWR-3 Reading SHHanauer, DR m 31 19M FSchroeder, DRL a ctet ao. 50-346 TRWilson, DRL RSBoyd, DRL RCDeYoung, DRL DJSkovholt, DRL HRDenton, DRL The Ioledo 1Mison Company RWKlecker, DRL AlTI4 ar. Glenn J. Sampson EGCase, DRS RRMaccary, DRS 0 o o g<
Vice President. Power PWR Branch Chiefs c'dison Plaam 300 Hadison avenue wwI OGC Toledo, Ohio 43652 y
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1 VHWilson, DRL (2)
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DMCrutchfield,DRL Genti-r.mn:
,U ACRS (16)
As a result of inspections conducted by the AT.C Division of Compliance with respect to the Davis-Besse duelear Power Station, we have been informed that both of the steam generators fabricated for the plant by the Babcock & Wilcox Company (B&W) contain unnor=alized plates installed on the secondary side of the ateam generators.
La steam generators in question were dcaigned and constructed as Class A vessels in accordance with Section III of the ASMZ Eoilar and Pressure Vessel Code.
Investigations conducted by the Division of Co=pliance with representatives of B&W disclosed that material property tests were conducted in accordance with the Code requirements.
However, our concern is that failure to normalize may result in non-unifor:a properties across the dimensions of the platea in question.
In this regard, we require additional information to substantiata that the naterial properties of the unnormalized plates ara acceptable for the intended design function of the accan generators. The specific information required is described i
in tua enclosure. Your response should be submitted as an amend:sent to the PS,ul.
Please contact us if you have any questions regarding this matter.
Sincerely, Original Signed by R. C. OsY:ung
- 2. C. DeYoung, Assistant Director for Pressurizea Water s,sactors Division of heactor Licensing Similar letter was sent to SMUD and inclosure:
ccncurred in by R. Maccary & G. Reine.h additional Information Esquired on January 24, 1972. DMC cMdc n, hee...a t tached....f..DRL A RWR.1 D.RL,; P,3,7,3.......D.R.L ; AD))@,
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Form AEC-51e,Rev,9-Sh AECM 0240
- c. s. acs casistst raceT sc crrier : t,7s o. +os-34.
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The Toledo Edison Company.JAN 31 1972 cc: Las11e Henry, Esq.
Fuller, Seney, Henry & Hodge 800 Owens-Illinois Building 405 Madison Avenue Toledo, Chio 43604 Garald Charnsif. Esq.
Jhaw, Pittman, Potts, Trowbridge & Madden 910 17th Street, ii.W.
Washington, D. C.
20LT6 Donald 3. Hauser, Iaq.
The Claveland Elsetric 111=insting Cocipany P. O. Box 5000, anon 610 Cleveland, Chio 44101 0@@0 WW mpg 7
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Form AEC-St* tRev. 9-53) AECM 0240
- c. s. covrasunt raciTosc orricz : ts o o. 4cs.24s
r AEQUEST FOR ADDITIONAL IliFORMATICN TOLEDO EDISON CCMP.O.T DAVIS-BESSE NUCLEAR POWER STATION DOCnT No. 50-346 1.
Since the failure to normalise certain places installed on the secondary side of the steam generators may result in non-uniform properties across the dimensions of the plates, estimate tb a m i n i== tensile and impact propertise in the unnormalized :natarial and provide the bases for such estimates.
2.
Based ou the estimated minimum properties of the unnormalized material, demonstrate by appropriate data and analyses that the placas are adequate for the intended service conditions.
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Form AEC-518 tRev. 9-53) AECM 0240
- c. s, ces Ep?ns:3T P1tDrT*NG OFFICE : 1970 0 - 4CS.144