ML17212A308

Forwards Matls Engineering Branch Request for Addl Info Re Facility Fsar.Info Required Concerns Design Assembly & Operating Conditions of Low Pressure Turbine Discs

ML17212A308
Person / Time
Site:	Saint Lucie
Issue date:	06/12/1981
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
References
NUDOCS 8107090479
Download: ML17212A308 (7)

Text

JUN I 2 1981

/t Docket No.:

50-389 Dr. Robert E. Uhrig, Vice President Advanced Systems and Technology Flor ida Power 8 Light Company P. 0.

Box 529100 Miami, Flor ida 33152 DISA>I BUT ION.

Do( set File LB153 Rdg DEisenhu't FJNiragl i a VNerses JLee RTedesco SHanauer RVo1 1mer TMurley RNattson RHartfiel d, NPA OELD OIE (3)

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SUBJECT:

ST.

LUCIE PLANT ~ UNIT 2 FSAR - RE(VEST FOR ADDITIONAL INFORMATION From the review of your application for an operating 1icense by the Material Application Section of the Material Engineering

Branch, we find that we need additional information regarding the St. Lucie Plant, Unit 2 FSAR.

The specific information required is 1 isted in the Enclosure.

Responses to the enclosed request should be submitted by June 29, 1981. If you cannot meet thi s date, please inform us within seven days after receipt of this 1etter of the date you plantto submi t your responses.

Please contact Mr. Nerses (301-492-7468),

St. Lucie 2 Prospect Manager, if you desire any discussion or clarification of the encl osed report.

Sincerely,

Enclosure:

As stated cc:

See next page Rober t L. Tedesco, Assistant Director for Licensing Division of Licensing 8i07090479 8i06i2 PDR ADQCK 05000389 A

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UNITED STATES NUCLEAR REGULATORY COMIVIISSlON WASHINGTON, D. C. 20555 JUN 3.3 )g81 Docket No.:

50-389 Dr. Robert E. Uhrig, Vice President Advanced Systems and Technology Florida Power 5 Light Company P. 0.

Box 529IOO Miami, Florida 33152

SUBJECT:

ST.

LUCIE PLANT, UNIT 2 FSAR - REQUEST FOR ADDITIONAL INFORMATION From the review of your application for an operating license by the Material Application Section of the Material Engineering

Branch, we find that we need additional information regarding the St. Lucie Plant, Unit 2 FSAR.

The specific information required is listed in the Enclosure.

Responses to the enclosed request should be submitted by June 29, 1981.'f you cannot meet this date, please inform-us within seven days after receipt of this letter of the date you plan to submit your responses.

Please contact Mr. Nerses (301-492-7468),

St. Lucie 2 Project Manager, if you desire any discussion or clarification of the enclosed report.

1 Sincerely,

Enclosure:

As stated obert L. Tedesco, Assistant Director for Licensing Division of Licensing cc:

See next page

0 Ll

252.8 FLORIDA POWER AND LIGHT COI'1PANY ST.LUCIE UNIT N0.2 ADDITIONAL INFOPJQTION RE(VEST - OL FSAR NTERMLS APPLICATION SECTION/

mcERIALr ENGrNEERING: BRANcH 252.1 Me have reviewed Section,10.2>>3 of the Final Safety Analysis Report submitted by the applicant.

Our evaluation cannot be completed without additional information from'the applicant relating to the design, assembly and operating conditions of the low pressure turbine discs.

Past experience with similar equipment in the United Kingdom and more recently with Mestinghouse turbines in the United States has revealed a propensity for stress corrosion cracking in discs which was not predictab'le.

In order for the staff to assess the potential for stress corrosion cracking in the applicant's plant, the following information will be required.

A-What lubricant was used in the hub area of the discs for assembly.

8-What are the similarities/differences between the discs in the St. Lucie Unit No.

2 turbines and those used by Westinghouse.

C-What are the operating temperatures in the bore area of the discs.

0- Which disc or discs are exposed to a oeisture level during operation that approximates the level of moisture present in cases of cracking.

E-Mhat are the calculated critica1 crack sizes and what is the method used to caIculate that size.

F-What capability for volumetric inspection of the disc hub areas is available to St. Lucie Unit No. 2.

Or. iRobert E. Uhrig, Vice President Advanced Systems and Technology Florida-Power 5 L'ight Company P. 0.

Box 529100 Miami, Florida 33152 ccs:

Harold f. Reis, Esq.

Lowenstein, Newman, Reis, Axelr ad 5 Toll 1025 Connecticut Avenue, N. M.

Washington, D. C; 20036 Norman A. Coll, Esq.

McCarthy, Steel, Hectory t Davis 14th Floor, First National Bank Building Miami, Flor ida 33131 Mr. Hartin H. Hodder 1131 N. E. 86th Street Miami, Florida 33138 Resident Inspector St. Lucie Nuclear Power Station c/o U. S. Nuclear Regulatory Commission 7900 South AlA Jensen Beach, Florida 33457

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