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=Text=
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{{#Wiki_filter:}}
{{#Wiki_filter:~___                    -.._~---                        .      -      . - . _ - - - . - -              ~ . - - - -
  , .I                                                                                                                    'I a          -ppaaar'%
([            k                              UNITED STATES L"-        le              j                NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30006 0001 l1                          !
              %gg        o                                  November 9, 1998 Mr. Gregory A. Maret l                  Director of Operations l                Vermont Yankee Nuclear Power Corporation
                .185 Old Ferry Road
: l.                Brattleboro, VT 05301-
 
==SUBJECT:==
REQUEST TO USE CODE CASE N560 AS AN ALTERNATIVE TO THE REQUIREMENTS OF ASME CODE, SECTION XI, TABLE IWB-2500-1 AT VERMONT YANKEE NUCLEAR POWER STATION (TAC NO. M99389)
 
==Dear Mr. Maret:==
 
By letters dated August 6,1997, August 15,1997, October 23,1997, July 31,1998, and September 4,1998, you requested that the NRC approve ASME Code Case N-560, "Altemative Examination Requirements for Class 1, Category B-J Piping Welds" for use at Vermont Yankee Nuclear Power Station (Vermont Yankee). The Code Case was proposed as an attemative to the requirements of ASME Code, Section XI Table IWB-2500-1 and relates to examination of l                Class 1, Category B-J, piping welds at Vermont Yankee. Specifically, you proposed to reduce l
the examination of ASME Code, Section XI, Category B-J welds from 113 welds to 41 welds and requested to use Code Case N-560 which permits this reduction as long as the licensee uses a probabilistic risk-informed approach in the selection of the welds. You also have augmented the implementation of Code Case N-560 at Vermont Yankee by using a methodology approved by the Electric Power Research Institute (EPRI) in EPRI TR-106706.
l                We have reviewed the proposed request as a site specific request applicable only to Vermont l~                Yankee. The results of the our review indicated that you have provided an acceptable attemative to the requirements of ASME Code Section XI and have shown that implemenotion of the program would result in an insignificant change in risk even with fewer inspections, ,ince the inspections will take place where degradation mechanisms are more likely to occur, and L                procedures and personnel will target these specific locations using improved techniques and expanded volumes. We have determined that the alternative method described in your submittal (ASME Code Case N-560 as augmented by EPRI TR-106706) provides equivalent or
: l.                better examination criteria for Class 1 Category B-J welds than that provided by the current L                Section XI requirements.
We therefore conclude that authorization of the your proposed attemative would provide an acceptable level of quality arti safety Pursuant to 10 CFR 50.55a(a)(3)(i) the attemative is authorized. This authorization does not constitute an NRC approval of Code Case N-560 for
                . generic use. The suitability of Code Case N-560 for generic use will be determined following                  ,
;                the staffs review of the Case. It is expected that the results of the staff s review will be j                documented in Regulatory Guide 1.147, " Inservice inspection Code Case Acceptability - ASME                i Section XI Division 1."
d k D o'* io!7,          d          l                                E!?:19 E2.E 8 EMS NY PDR a
 
J G. Maret                                                                                                                                                                                      i
                                                                                                                                      )
Our detailed evaluation and conclusions are documented in the enclosed safety evaluation.
                                                                                                                                      )
Sincerely, Original signed by i
Cecil O. Thomas, Director Project Directorate 1-3 Division of Reactor Projects - 1/11                            1 Office of Nuclear Reactor Regulation                            j Docket No. 50-271                                                                                                    l l
 
==Enclosure:==
Safety Evaluation                                                                                          l i
cc w/ encl: See next page I
QLS_IRIBUTION:
Docket File -                  BMcCabe        THarris (TLH3 e-mail SE only) GHill(2)
PUBLIC                          GBagchi        SDinsmore PDI-3 Reading File              ACRS            GGeorgiev                                                            ,
JZwolinski                      RBarrett        GLainas CCowgill, RI                    RCroteau        GHolahan OGC                            TClark          JStrosnider DOCUMENT NAME:G:\CROTEAU\VYM99389.REL 4 su g(wlm Tgy a copy of this document, indicate in the box: "C" = Copy without enclosures "E" = Copy with enclosures "N" = No copd  ,,f OFFICE      PM:PDI-3                  LA:PDl-3                PD1.3/D      _    A/ OGM%ML                    E6G%)        E- ,
NAME                                  TClark #                                            2p/ reg        '
RCroteau Q'"                                        6]Afsn13fs            l ~
GBagchi        j DATE        1D/ 4 /98                  10/n /98                18/ 9 /98                  19/ 6 /98            jl/6/9&
OFFICIAL RECORD COPY 47l[29
 
1      ..
: i. .
I 5    .
i G. Maret                                            Vermont Yankee Nuclear Power Station
)
I m:                            '
Regional Administrator, Region i                    Mr. Raymond N. McCandless i                U. S. Nuclear Regulatory Commission -  .          Vermont Division of Occupational
,                475 Allendale Road                                      and Radiological Health j                King of Prussia, PA ' 19406                        Administration Building Montpelier, VT- 05602 -
Mr. David R. Lewis Shaw, Pittman, Potts & Trowbridge                  Mr. Gautam Sen 2300 N Street, N.W.                                Licensing Manager Washington, DC 20037-1128                          Vermont Yankee Nuclear Power Corporation Mr. Richard P. Sedano, Commissioner                185 Old Ferry Road Vermont Department of Public Service                Brattleboro, VT 05301 120 State Street,3rd Floor Montpelier, VT 05602                                Resident inspector Vermont Yankee Nuclear Power Station          l Public Service Board                                U. S. Nuclear Regulatory Commission State of Vermont                                    P.O. Box 176                                  ;
120 State Street                                    Vemon, VT . 05354                            '
Montpelier,VT 05602 Mr. Peter LaPorte, DVector Chairman, Board of Selectmen                        ATTN: James Mnckerheide Town of Vemon                                      Massachusetts Emergency Management P.O. Box 116                                              Agency Vemon, VT 05354-0116                                400 Worcest sr Rd.
P.O. Box 1456                                  l Mr. Richard E. McCullough                          Framingham, MA 01701-0317 Operating Experience Coordinator Vermont Yankee Nuclear Power Station                Jonathan H. Block, Esq.
P.O. Box 157                                        Main Stre9t
              , Govemor Hunt Road                                  P. O. Box 566 Vemon, VT 05354                                    Putney, VT 05346-0566 G. Dana Bisbee, Esq.                                Mr. Michael J. Daley                          1 Deputy Attomey General                            Trustee and Legislative Representative 33 Capitol Street                                  New England Coalition on Nuclear Concord, NH 03301-6937                                Pollution, Inc.                            l Box 545                                      i Chief, Safety Unit                                  Brattleboro, VT 05301                          l Office of the Attomey General One Ashburton Place,19th Floor Boston, MA 02108                                                                                  '
Ms. Deborah B. Katz Box 83                                                                                            l Shelbume Falls, MA 01370                                                                          l l
:}}

Revision as of 22:16, 16 December 2020

Forwards SE Accepting Request That NRC Approve ASME Code Case N-560, Alternative Exam Requirements for Class 1, Category B-J Piping Welds, for Plant
ML20195C403
Person / Time
Site: Vermont Yankee Entergy icon.png
Issue date: 11/09/1998
From: Thomas C
NRC (Affiliation Not Assigned)
To: Maret G
VERMONT YANKEE NUCLEAR POWER CORP.
Shared Package
ML20195C407 List:
References
FACA, TAC-M99389, NUDOCS 9811170102
Download: ML20195C403 (4)
v • d • e


Text

~___ -.._~--- . - . - . _ - - - . - - ~ . - - - -

, .I 'I a -ppaaar'%

([ k UNITED STATES L"- le j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30006 0001 l1  !

%gg o November 9, 1998 Mr. Gregory A. Maret l Director of Operations l Vermont Yankee Nuclear Power Corporation

.185 Old Ferry Road

l. Brattleboro, VT 05301-

SUBJECT:

REQUEST TO USE CODE CASE N560 AS AN ALTERNATIVE TO THE REQUIREMENTS OF ASME CODE, SECTION XI, TABLE IWB-2500-1 AT VERMONT YANKEE NUCLEAR POWER STATION (TAC NO. M99389)

Dear Mr. Maret:

By letters dated August 6,1997, August 15,1997, October 23,1997, July 31,1998, and September 4,1998, you requested that the NRC approve ASME Code Case N-560, "Altemative Examination Requirements for Class 1, Category B-J Piping Welds" for use at Vermont Yankee Nuclear Power Station (Vermont Yankee). The Code Case was proposed as an attemative to the requirements of ASME Code,Section XI Table IWB-2500-1 and relates to examination of l Class 1, Category B-J, piping welds at Vermont Yankee. Specifically, you proposed to reduce l

the examination of ASME Code,Section XI, Category B-J welds from 113 welds to 41 welds and requested to use Code Case N-560 which permits this reduction as long as the licensee uses a probabilistic risk-informed approach in the selection of the welds. You also have augmented the implementation of Code Case N-560 at Vermont Yankee by using a methodology approved by the Electric Power Research Institute (EPRI) in EPRI TR-106706.

l We have reviewed the proposed request as a site specific request applicable only to Vermont l~ Yankee. The results of the our review indicated that you have provided an acceptable attemative to the requirements of ASME Code Section XI and have shown that implemenotion of the program would result in an insignificant change in risk even with fewer inspections, ,ince the inspections will take place where degradation mechanisms are more likely to occur, and L procedures and personnel will target these specific locations using improved techniques and expanded volumes. We have determined that the alternative method described in your submittal (ASME Code Case N-560 as augmented by EPRI TR-106706) provides equivalent or

l. better examination criteria for Class 1 Category B-J welds than that provided by the current L Section XI requirements.

We therefore conclude that authorization of the your proposed attemative would provide an acceptable level of quality arti safety Pursuant to 10 CFR 50.55a(a)(3)(i) the attemative is authorized. This authorization does not constitute an NRC approval of Code Case N-560 for

. generic use. The suitability of Code Case N-560 for generic use will be determined following ,

the staffs review of the Case. It is expected that the results of the staff s review will be j documented in Regulatory Guide 1.147, " Inservice inspection Code Case Acceptability - ASME i Section XI Division 1."

d k D o'* io!7, d l E!?:19 E2.E 8 EMS NY PDR a

J G. Maret i

)

Our detailed evaluation and conclusions are documented in the enclosed safety evaluation.

)

Sincerely, Original signed by i

Cecil O. Thomas, Director Project Directorate 1-3 Division of Reactor Projects - 1/11 1 Office of Nuclear Reactor Regulation j Docket No. 50-271 l l

Enclosure:

Safety Evaluation l i

cc w/ encl: See next page I

QLS_IRIBUTION:

Docket File - BMcCabe THarris (TLH3 e-mail SE only) GHill(2)

PUBLIC GBagchi SDinsmore PDI-3 Reading File ACRS GGeorgiev ,

JZwolinski RBarrett GLainas CCowgill, RI RCroteau GHolahan OGC TClark JStrosnider DOCUMENT NAME:G:\CROTEAU\VYM99389.REL 4 su g(wlm Tgy a copy of this document, indicate in the box: "C" = Copy without enclosures "E" = Copy with enclosures "N" = No copd ,,f OFFICE PM:PDI-3 LA:PDl-3 PD1.3/D _ A/ OGM%ML E6G%) E- ,

NAME TClark # 2p/ reg '

RCroteau Q'" 6]Afsn13fs l ~

GBagchi j DATE 1D/ 4 /98 10/n /98 18/ 9 /98 19/ 6 /98 jl/6/9&

OFFICIAL RECORD COPY 47l[29

1 ..

i. .

I 5 .

i G. Maret Vermont Yankee Nuclear Power Station

)

I m: '

Regional Administrator, Region i Mr. Raymond N. McCandless i U. S. Nuclear Regulatory Commission - . Vermont Division of Occupational

, 475 Allendale Road and Radiological Health j King of Prussia, PA ' 19406 Administration Building Montpelier, VT- 05602 -

Mr. David R. Lewis Shaw, Pittman, Potts & Trowbridge Mr. Gautam Sen 2300 N Street, N.W. Licensing Manager Washington, DC 20037-1128 Vermont Yankee Nuclear Power Corporation Mr. Richard P. Sedano, Commissioner 185 Old Ferry Road Vermont Department of Public Service Brattleboro, VT 05301 120 State Street,3rd Floor Montpelier, VT 05602 Resident inspector Vermont Yankee Nuclear Power Station l Public Service Board U. S. Nuclear Regulatory Commission State of Vermont P.O. Box 176  ;

120 State Street Vemon, VT . 05354 '

Montpelier,VT 05602 Mr. Peter LaPorte, DVector Chairman, Board of Selectmen ATTN: James Mnckerheide Town of Vemon Massachusetts Emergency Management P.O. Box 116 Agency Vemon, VT 05354-0116 400 Worcest sr Rd.

P.O. Box 1456 l Mr. Richard E. McCullough Framingham, MA 01701-0317 Operating Experience Coordinator Vermont Yankee Nuclear Power Station Jonathan H. Block, Esq.

P.O. Box 157 Main Stre9t

, Govemor Hunt Road P. O. Box 566 Vemon, VT 05354 Putney, VT 05346-0566 G. Dana Bisbee, Esq. Mr. Michael J. Daley 1 Deputy Attomey General Trustee and Legislative Representative 33 Capitol Street New England Coalition on Nuclear Concord, NH 03301-6937 Pollution, Inc. l Box 545 i Chief, Safety Unit Brattleboro, VT 05301 l Office of the Attomey General One Ashburton Place,19th Floor Boston, MA 02108 '

Ms. Deborah B. Katz Box 83 l Shelbume Falls, MA 01370 l l

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