ML20141C545

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Forwards RAI Re Review of Beaver Valley Units 1 & 2 TS Change to Allow Use of Steam Generator Tube Sleeves Designed by Abb/Combustion Engineering
ML20141C545
Person / Time
Site: Beaver Valley
Issue date: 06/23/1997
From: Brinkman D
NRC (Affiliation Not Assigned)
To: Cross J
DUQUESNE LIGHT CO.
References
TAC-M98137, TAC-M98187, NUDOCS 9706250290
Download: ML20141C545 (5)


Text

._ ._ - ._. . _ - _ . . - _ . - . _ _ . _ _ -

June 23, 1997 j

  • Mr. J. E. Cross l President-Generation ~ Group

.Duquesne Light. Company

. Post Office Box 4 Shippingport, PA 15077 I i

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING REVIEW 0F BEAVER i VALLEY POWER STATION (BVPS), UNIT NOS. 1 AND 2. TECHNICAL  !

SPECIFICATION CHANGE TO ALLOW USE OF STEAM GENERATOR TUBE SLEEVES DESIGNED BY ABB/ COMBUSTION ENGINEERING (TAC NOS. M98137 AND M98138)

Dear Mr.. Cross:

By letter dated March 10, 1997, Duquesne Light Company (DLC) submitted an amendment request to modify Technical Specification 3.4.5 to allow steam generator tube sleeving using the Combustion Engineering (CE) process. The NRC staff has initiated review of the proposed amendment but has determined that additional information is required to complete the review; The required additional information is identified-in the enclosed RAI. DLC is requested to provide the additional information within 30 days of receipt of this letter, so that the NRC staff may complete the review within a timely manner. l Should you have any questions on this matter, please contact me at (301) 415-1409.

Sincerely,

/S/ 'T. Liu for I

Donald S. Brinkman, Senior Project Manager Project Directorate I-2 Division of Reactor Projects - I/II  ;

Office of Nuclear Reactor Regulation ~

Docket Nos. 50-334/412

Enclosure:

RAI cc w/ encl: See next page DISTRIBUTION:  !

Docket File GHornseth i l

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DATE b/W/97 6 /u/97 [2/ /97 [p/7B/97 0FFICIAL RECORD COPY E  ;

DOCUMENT NAME: BV98137.RAI 9706250290 970623 PDR ADOCK 05000334 P PDR ,1

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NUCLEAR REGULATORY COMMISSION o WASHINGTON, D.C. 30666-0001

\ ,,,,,* June 23, 1997 Mr. J. E. Cross ,

President-Generation Group i

Duquesne Light Company Post Office Box 4 Shippingport. PA 15077

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING REVIEW OF BEAVER  ;

VALLEY POWER STATION (BVPS) UNIT NOS. 1 AND 2. TECHNICAL l SPECIFICATION CHANGE TO ALLOW USE OF STEAh GENERATOR TUBE SLEEVES DESIGNED BY ABB/ COMBUSTION ENGINEERING (TAC NOS. M98137 AND M98138)

Dear Mr. Cross:

By letter dated March 10. 1997 Duquesne Light Company (DLC) submitted an

, amendment request to modify Technical Specification 3.4.5 to allow steam

generator tube sleeving using the Combustion Engineering (CE) process. The NRC staff has initiated review of the proposed amendment but has determined that additional information is required to complete the review. The required additional information is identified in the enclosed RAI. DLC is requested to provide the additional information within 30 days of receipt of this letter.

so that the NRC staff may complete the review within a timely manner.

Should you have any questions on this matter, please contact me at (301) 415-1409.

Sincerely. l L dc ks.. f' Donald S. Brinkman Senior Project Manager l

< Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket Nos. 50-334/412

Enclosure:

RAI cc w/ encl: See next page e

l J. E. Cross Beaver Valley Power Station t Duquesne Light Company Units 1 & 2 cc:

Jay E. Silberg, Esquire Bureau of Radiation Protection Shaw. Pittman, Potts & Trowbridge Pennsylvania Department of 2300 N Street. NW. Environmental Resources Washington, DC 20037 ATTN: Michael P. Murphy Post Office Box 2063 i Director-Safety and Licensing Harrisburg, PA 17120  !

Department (BV-A)

Duquesne Light Company Mayor of the Borrough of Beaver Valley Power Station Shippingport ,

PO Box 4 Post Office Box 3 '

Shippingport. PA 15077 Shippingport. PA 15077 1

Commissir er Roy M. Smith Regional Administrator, Region I i West Virginia Department of Labor U.S. Nuclear Regulatory Commission ;

Building 3. Room 319 475 Allendale Road l Capitol Complex '

King of Prussia, PA 19406 Charleston. WVA 25305 I Resident Inspector l Director. Utilities Department U.S. Nuclear Regulatory Commission Public Utilities Commission Post Office Box 298 180 East Broad Street Shippingport. PA 15077 I Columbus OH 43266-0573 1 Director, Pennsylvania Emergency Duquesne Light Company Management Agency Beaver Valley Power Station Post Office Box 3321 PO Box 4 Harrisburg, PA 17105-3321 Shi)pingport. PA 15077 ATT1: S. C. Jain, Vice President Ohio EPA-DERR Nuclear Services.(BV-A)

ATTN: Zack A. Clayton Post Office Box 1049 Columbus OH 43266-0149 Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803 .

1 Duquesne Light Company l Beaver Valley Power Station  !

PO Box 4 l Shi]pingport, PA 15077 l i ATTi: R. L. Grand. Division Vice l l President. Nuclear Operations Group l l . and Plant Manager (BV-SOSB-7) l l

REQUEST FOR ADDITIONAL INFORMATION REGARDING t

CHANGE TO TECHNICAL SPECIFICATION 3.4.5 TO ALLOW STEAM GENERATOR TUBE SLEEVING USING THE COMBUSTION ENGINEERING PROCESS BEAVER VALLEY POWER STATION. UNIT NOS. 1 AND 2 l I

DOCKET NOS. 50-334 AND 50-412 )

By letter dated March 10. 1997. Duquesne Light Company (DLC) submitted a license amendment request to modify Technical Specification (TS) 3.4.5 to allow steam generator tube sleeving using the Combustion Engineering (CE) process. The NRC staff has initiated review of the proposed amendment but has determined that additional information is necessary to completed the review.

The NRC staff requests that the licensee provide response to the following comments in order for the staff to complete the review.

1. The licensee should confirm that the existing TS plugging / repair limit for tubes (40%) is correct or provide an appropriate revision.

Historically, some TSs used certified material test report (CMTR) values for tube material strength instead 'of American Society of Mechanical Engineers (ASME) Code minimums. The plugging /re) air limit should use the ASME Code minimum for material strength in t1e calculation of Code allowable flaw depth minus NDE uncertainty (20%). The staff notes that in the amendment submittal the plugging limit for the CE sleeves (32%)

is calculated in this desired manner.

2. The licensee committed to perform post weld heat treatment (PWHT) of the freespan sleeve welds. This commitment is congruent with the staff position on PWHT. However, there is no accompanying TS wording reflecting this commitment. Consequently, the licensee should provide suitable TS wording to include PWHT in the sleeving process or the Office of Nuclear Reactor Regulation (NRR) should issue the amendment ,

with a license 8 condition to perform PWHT. Should the licensee decide to i omit PWHT then supporting technical justification should be submitted.

Such justification should address issues including: projected impact on service life of the sleeve joints; anticipated plans for future repairs to the sleeve joints and/or steam generator replacement; and whether the omission of PWHT would result in a new or accelerated mode of degradation. l l

3. The staff believes that the licensee should adopt inspection and I expansion criteria consistent with that of other facilities licensed to install sleeves. As a minimum, the initial sample selected at each inspection should include 20 percent of all sleeved tubes. Please provide appropriate wording and a table in the TS reflecting this ,

criteria. For reference, a previously adopted table incorporated in the l TSs of another licensee is attached.

Attachment,: As stated i

i, i

e i

1 .

TABLE 4.4-3 1

! STEAM GENERATOR REPAIRED TUBE INSPECTION l

l l 157 SAMPLE INSPECTION 2ND $AAFLE INSPECTION l Samov see muun an.n nessee anus Act.n nosonee

, A mnmum of 20% of C1 None N.A. H.A.

j eepened luees (1)(2) l

\

C2 Plug deledne repokei tees C1 None and maped 100% of the sepered teos h hs S.G.

j C2 pouc eefective repened tuees ]

C3 perform act.n for C 3 resun et j tst semple l l

i C3 inspret es repered tubes hINs As other S.G.s are None  ;

5 G., plus defect 6ve tubes and C1 )

hoped 20% si the repeired

{

4 tubes h each other $.G.

4 1

4 Net (sehen to NRC pursuord le Some S.G s C 2 peelerm schen for C 2 resut of j 15072 p)(2)of 10 CFR Peft 50 but ne sessenet aust semple 1

8 G ere C 3 e

, e Aden.nel8 G in hopect et repelred tuees ir, 4 C3 each 8.G eruf plug delecteve j

kbes NetW.eten to NRC gursusnt te 15072 m)(2)of to

cpn Part 50 i (s) Each eepe.r memed a conee'ee a wperate pseuemen ser scermnet.n er esepe em

, g)im mpecion of repened tunn mer be pertened en tunes tem t es 4 steem pnemers messe en suis, pione. ,

1 1

1' i

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