ML20113D119

Requests Approval to Use Provisions of IWA-5250 in 1990 Addenda & Use of Alternative to 1989 Edition of ASME Boiler & Pressure Vessel Code,Section XI for Plants,Units 1 & 2,per 10CFR50.55A(a)(3)(i & II)

ML20113D119
Person / Time
Site:	Catawba
Issue date:	06/24/1996
From:	Mccollum W DUKE POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9607030021
Download: ML20113D119 (2)

Text

l ll l DukeIbu er Company inUJ4uR.11cCou.tv.Jk Catau ba Nuclear Generation ikpartment lice hesident 4800 ConcordRc>ad (SWJS11P00 O!!!ce hrk. SC29745 (803)R31-3426Far 1

) DUKEPOWER June 24, 1996 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001

Subject:

Duke Power Company l

Catawba Nuclear Station, Units 1 & 2 Docket Nos. 50-413, 50-414 Request to use alternative to 1989 edition of ASME Boiler and Pressure Vessel Code, Section XI.

l Serial No. 96-03 Pursuant to 10CFR 50.55a-(a) (3) (i & ii), Duke Power Company requests the use of an alternative to the 1989 edition of ASME Boiler and Pressure Vessel Code, Section XI for. Catawba Units'1 & 2. ,

4 Specifically, Duke Power requests approval to use the provisions of IWA-5250 in the 1990 Addenda.

1

, It is required by the 1989 ASME Code (no addenda), j Subsection XI, IWA-5250 (a) (2 ) "if leakage occurs at a bolted connection, the bolting shall be removed, VT-3 visually examined for corrosion, and evaluated in accordance with IWA-3100:"

Duke Power Company believes these requirements described above create a hardship for utilities and compromises radiation safety. Removal of all bolting from a mechanical )

joint is not always required to assure the connection has not degraded. In addition, some connections are more difficult to seal after disassembly when compared to retorquing an already assembled connection. Complete disassembly of a connection in a radiation area would also increase personnel exposure. ASME has recognized such situations and changed this requirement to allow removal and evaluation of one bolt closest to the leak in a bolted connection identified as leaking. l h

) 9607030021 960424 PDR ADOCK 05000413

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Document Control Desk 4 Page 2 )

June 24, 1996 l

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Request for Approval of Alternative Examinations: I Duke Power Company proposes to apply the requirements of the ;

1990 Addenda that allows for only the one bolt closest to i the leak be removed and examined visually by a VT-3 inspector.

l Catawba intends to use this alternative examination method during the current Unit 1 EOC9 outage. Approval of this alternate examination method is requested by August 30, 1996.

Should there be any questions concerning this change, please call D. Tower at (803) 831-3419.

Very truly yours,

'~

William R. McCollum, jf.

Vice President Catawba Nuclear Station xc:

S.D. Ebneter, Regional Administrator Region II R.J. Freudenberger, Senior Resident Inspector Catawba Nuclear Station P.S. Tam, Senior Project Manager ONRR

.