View source for L-97-051, Submits Special Rept Required to Document,Prior to Resumption of Plant Operation,Results of SG Tube Insps Which Fall Into TS Category C-3.RC-E-1B SG Was pre-designated as Generator Required to Be Sampled During 971017 Insp

{{Adams
| number = ML20198P785
| issue date = 11/03/1997
| title = Submits Special Rept Required to Document,Prior to Resumption of Plant Operation,Results of SG Tube Insps Which Fall Into TS Category C-3.RC-E-1B SG Was pre-designated as Generator Required to Be Sampled During 971017 Insp
| author name = Jain S
| author affiliation = DUQUESNE LIGHT CO.
| addressee name = 
| addressee affiliation = NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
| docket = 05000334
| license number = 
| contact person = 
| document report number = L-97-051, L-97-51, NUDOCS 9711120005
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE
| page count = 3
}}

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{{#Wiki_filter:- - -                                                                                         .    . _  .     - .
                                                                 .wot Valey Power Stat 6on SNppingport. PA 15077 4004
                          "           "                                                    November 3,1997      ''"
L-97-051                      l U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC- 20555-0001 Gentlemen:
Ecaver Valley Power Station, Unit No.1 Docket No. 50-334, License No. LPR-66
                                                             - Special Report In accordance with Appendix A, Beaver Valley Technical Specification 4.4.5.5.c,
                      " Steam Generators," the following Special Report is submitted. This report is required to document, prior to resumption of plant operation, the results of steam' generator tube inspections which fall into technical specification Category C-3.
Technical Soccification 4,4.5.5.c:
The RC-E-1B steam generator was pre-designated as the generator required to be sampled during this inspection interval. Examination of the RC-E-1B steam generator,               ;
completed October 17,1997, resulted in the designation as defective a total of fifty (50)          ;
tubes. These defective tubes were identified using the Plus Point Probe examination of the hot leg top-of-tubesheet region. These tubes have been removed from service                    l through tube plugging.
The primary degradation mechanism affecting the Beaver Valley Power Station Unit 1 Steam Generators is Outside Diameter Stress Corrosion Cracking (ODSCC) at the hot leg top-of-tubesheet in the sludge pile regions and at tube support plate intersections.
Boric acid addition to the secondary water is continuing in an effort to reduce the propensity of ODSCC. Additionally, secondary water chemistry molar ratio control has been implemented to further mitigate the growth and propagation of ODSCC. Sludge                   :
lancing the secondary side top-of-tubesheets has been performed to remove acemnula d 9711120005 971103 PDR     ADOCK 05000334                                                       'h t G                    PDR

d t                November 3,1997 L-97-051 Page 2 4
1 siudge that contributes to the formation of the aggressive environment that can result in the initiation of ODSCC in this region. Furthermore, secondary water chemistry control is optimized to keep co Tosion product transport to the steam generators as low as possible to minimize the accumulation of new sludge during the operating cycle.
Sincerely, h _e S. C. Jain LB/ds T
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        -. .                                                                                                1 November 3,1997 -
                     ~ I-97-051 l Page 31
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cc: Mr. H-. J. Miller, Regionalldministrator
                            .Ur.ited States Nuclear Regulatory Commission Region 1-           .
475 Allendale Road                                                            ,
King of Prussia, PA- 19406 -
Mr. D. S. Brinkman BVPS Licensing Project Manager                                              -,
United Statea Nuclear Regulatory Commission
                             . Washington,- DC ' 20555                                                    _,
1
                            - Mr. Dsid Kern BVPS Senior Resident Inspector United States Nuclear Regulatory Commission Mr. J. A. Hultz Ohio Edison Company 76 S. Main Street Akron, OH 44308 Mr. Steven Dumek Centerior Energy Corporation 6670 Beta Drive Mayfield Valley, OH 44143
;x                            INPO Records Center 700 Galleria Parkway Atlanta, GA 30339-5957 Mr. Michael P. Murphy Bureau of Radiation Protection Department of Environmental Protection RCSOB-13th Floor P.O. Box 8469
:.Harrisburg, Pall 7105-8469 Director, Safety Evaluation & Control
                             . Virginia Electric & Power Company 5000 Dominion Blvd.-
Innsbrook Tech. Center Glen Allen,VA 23060
                                                                                ,.   - -}}