ML20217J498

Requests That Code Case N-498-1, Alternative Rules for 10- Year Sys Hydrostatic Testing for Class 1,2 & 3 Sys,Section Xi,Div 1, Be Approved for Use at North Anna Unit 2 to Complete Second Interval Requirements

ML20217J498
Person / Time
Site:	North Anna
Issue date:	10/14/1997
From:	Saunders R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RTR-REGGD-01.147, RTR-REGGD-1.147 97-552, NUDOCS 9710210138
Download: ML20217J498 (4)

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4 Vim;isir Ei.EcTunc ANi> lbwnn CmWANY Riciauosis, V!m;isia 2326:

october 14, 1997 1

United States i4uclear Regulatory Comm:ssion Serial No.: 97-552 Attention: Document Control Desk NL&OS/ETS Washington, D. C. 20555 Docket No.: 50-339 License No.:NPF Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNIT 2 INSERVICE INSPECTION PROGRAM ASME CODE CASEJ-498-1 ASME Code Case N 498-1, "Altemative Rules for 10-Year System Hydrostatic Testing for Class 1, 2, and 3 Systems,Section XI, Division 1", (attached) was approved by ASME on May 11, 1994. This Code Case has not yet been approved for use by Regulatory Guide 1.147, inservice Inspection Code Case Acceptability ASME Section XI, Division 1. Therefore, pursuant to 10 CFR 50.55a(a)(3), it is requested that Code

Case N-498-1 be approved for use at North Anna Unit 2 to complete its second interval requirements.

North Anna Unit 2 is scheduled to begin its second interval, third period,10-year _

inservice inspections during its next refueling outege, which is currently scheduled to begin April 5,1998. Code Case N-498-1 now provides an alternative to the Class 3, as well as the Class 1 and 2 (Code Case N-498) hydrostatic test Code requirements (ASME Section XI 1986 Edition). Proper advance planning for this upcoming outage necessitates that advance approval for use of Code Case 11-498-1 be obtained in lieu of the normal Regulatory Guide 1.147 revision process.

Hydrostatic tests are historically difficult to perform. They frequently require extending test durations while non-safety related ques such as maintenance boundary valve isolation problems are resolved. R 4 icreases the cumulative exposure of test personnel and system tag-out duration. By taking advantage of Code Case N-498-1, increased testing flexibility is provided, allowing testing to be performed at nominal operating pressure. In tum, this significantly reduces the number of test blocks, system tag-outs, and corresponding boundary valves required to complete testing. This flexibility is accomplished while maintaining an acceptable level of safety and quality as determined by the ASME Code.  !

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' Code Case N-498-1 will continue to provide assurance of component structuralintegrity as intended by the ASME Code and, as such, it is requested that interim use of the

Code Case be approved for the upcoming North Anna Unit 2 outage, currently

} scheduled to commence April 1998, if you have any questions conceming this request, please contact us,

! Very truly yours, -

l R. F. Saunders j Vice President - Nuclear Engineering and Services

! Attachment cc: U. S. Nuclear Regulatory Commission Region ll Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 i Atlanta, Georgia 30303

Mr. M.'J. Morgan NRC Senior Resident Inspector l North Anna Power Station i

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E CODE CASE N-498-1

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CASE L '

N-498-1 l CASES OF ASME BOGE.a AND PaESsUaE YESSEL COoE j- . .

Approval Dete: May 11,1994 see Nurnenlast haler dier saphonien

and any reemrmneen denen.

l Case N 4981 - (2) De boundary subject to test pressurization ,

1 Alternative Rules for 164 ear System Hydrostatic during the system pressure test shall extend to all-

! Testing for Oass 1,2, and 3 Systeams Qass 2 components included in those portions of sy>

l Section XI, Division 1 tems required to operate or support the safety system

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function up to and including the first normally closed

Inquhy

What alternative rules may be used in lieu valve, including a safety or relief valve, or valve co-

! of these required by Section X1, Division 1, Table pable of automatic M i when the safety function

IWB 25001. Category B-P, Table IWC 25001, Cat. is required.

j esory C H, and Table IWD 25001. Categories D A, (3) Prior to poik. ;sg the VT 2 visual exami-

[ D-B, and D-C, as applicable, for the 10-year system hydrostatic test?

nation, the system shall be pressurized to nominal operating pressure for a minimum of 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> for in-  !

L i sulated systems and 10 minutes for noninsulated sy>

j tems. De system shall be maintained at naminal op-

erating pressure during performance of the W-2

l. Jtsplyt visual armeninatinn l (a) It is the opinica of the Committee that as an (4) De W 2 visual *==inattaa shaill include alternative to the 10-year system hydrostatic test re- all va within the boundary identified in f

quired by Table IWB 25001, Category B-P, the foi- (b)(2) above.

i- lowing rules shall be used. (5) Test instrumentation swe.;. u.ts of IWA-

! (1) A system leakage test (IWB-5221) shall be 5260 are not applicable.

3 conducted at or near the end of each %+I-3n in. (c) It is the opinion of the Committee that, as an terval, prior to reactor startup. alternative to the 10 year system hydrostatic test re-(2) The boundary subject to test pressmization quired by Table IWD 25001, Categories D-A, D-B, ,

[ during the system leakage test shall extend to all or D C (D B for the 1989 Bdition with the 1991 and subsequent Addenda), as applicable, the following l Cass 1 pressure retaining components within the sys-

! tem boundary, rules shall be used. -

l (3) Prior to performing the W-2 visual aand. (1) A system pressure test shall be conducted at

! nation, the system shall be pressurized to na-Ni or near the end of each i==aa*hn interval or during L operating pressure for at least 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> for insulated the same % period of each ia==*iae inter- i i systems and 10 minutes for noninsulated systems, val of la=~*iaa Fivy- B.

l The system shall be maintained at nominal operating (2) De bv. deiy subject to test p. ui, tion

pressure during performance of the VT 2 visual ex- during the system pressure test shall extend to all

amination.- Cass 3 components included in those portions of sys-(4) Test temperatures and pressures shall not tems required to operate or support the safety system exceed limiting conditions for the lylrostatic test function up to and including the first normally closed i- curve a contained in the plant Technical Specifica- valve, including a safety or relief valve, or valve co-l tions. pable of automatic closure when the safety function j (5) The VT-2 visual examination shall include is rt. quired.

[ all components within the boundary identified in (3) Prior to performing the VT-2 visual exami-i (a)(2) above. nation, the system shall be pressurized to nominal' (6) Test instrumentation requirements of IWA. operating pressure for at least 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> for insulated j-

$260 are not applicable, systems and 10 minutes for noninsulated systems.

1 (b) It is the opinion of the Committee that, as an The system shall be maintained at nominal operating alternative to the 10-year system hydrostatic test re. pressure during performance of the VT-2 visual ex-quired by Table IWC-25001, Category C-H, the fol- amination.

j lowing rules shall be used. (4) De W-2 visual examination shall include j  ; . (1) A system pressure test shall be conducted at all components within the boundary identified in j or near the end of each inspection interval or during (c)(2) above.

i the same inspection period of each inspection inter. (5) Test instrumentation requirements of IWA-l val of Inspection Program B. 5260 are not applicable.

4 849 SUPP. 9 - NC '

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