ML18152B764

Requests That Code Case N-498-1 Be Approved for Use at Surry Power Station Unit 1,to Provide Alternative to Class 1,2 & 3 Hydrostatic Test Code Requirements for Upcoming Third Interval,Third period,10-yr ISI on 001014

ML18152B764
Person / Time
Site:	Surry
Issue date:	07/06/1998
From:	Hartz L VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
98-352, NUDOCS 9807140130
Download: ML18152B764 (4)

Text

e VIRGINIA ELECTRIC AND PowER CoMPANY RICHMOND, VIRGINIA 23261 July 6, 1998 United States Nuclear Regulatory Commission Serial No.: 98-352 Attention: Document Control Desk NL&OS/GDM: RO Washington, D. C. 20555 Docket No.: 50-280 License No.: DPR-32 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 1 INSERVICE INSPECTION PROGRAM ASME CODE CASE N-498-1 ASME Code Case N-498-1 (attached), "Alternative Rules for 10-Year System Hydrostatic Testing for Class 1, 2, and 3 Systems,Section XI, Division 1", was approved by ASME on May 11, 1994. This Code Case has not been approved for use by Regulatory Guide 1.147, lnservice 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 Surry Power Station Unit 1. This Code Case has beei:, previously approved for use at Surry Power Station Unit 2 in the NRC's letter dated February 6, 1995.

Surry Unit 1 is scheduled to begin its third interval, third period, 10-year inservice inspections on October 14, 2000. Code Case N-498-1 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 1989 Edition). Planning associated with future Code required hydrostatic tests requires that advance approval for use of Code Case N-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 the duration of the test while non-safety related issues, such as maintenance boundary .

valve isolation problems, are resolved. This increases the cumulative exposure of test personnel and extends the system t~g-out duration. By taking advant~ge of Code Case r N-498-1, increased testing flexibility is provided by permitting testing to be performed at nominal operating pressure. 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. consensus process. ,I f

/7 *I t

' ~ 0 I O<<--r .

• ~ -~) *:*. ~ \..i J 1

_____ 9_a_o_7_1_4_0_1~ao~c,=-a=-o=-:7=-o=-6~---------

PDR ADOCK 05000280 G PDR

Code Case N-498-1 will continue to provide assurance of component structural integrity as intended by the ASME Code and, as such, it is requested that the use*of this Code Case be approved for Surry Unit 1.

If you have any questions concerning this request, please contact us.

Very truly yours, L. N. Hartz Vice President - Nuclear Engineering and Services Attachment Commitments contained in this letter: None.

cc: U. S. Nuclear Regulatory Commission Region II Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303 Mr. R.A. Musser NRC Senior Resident Inspector Surry Power Station

Attachment ASME CODE CASE N-498-1 ALTERNATIVE RULES FOR 10-YEAR SYSTEM HYDROSTAIC TESTING FOR CLASS 1, 2, AND 3 SYSTEMS SECTION XI, DIVISION 1

... ;

i

• CASES OF ASME BOILER AND PRESSURE VESSEL CODE

• N-498-1 CASE Approval [?ate: May 11, 1994 See Numerical Index for expiration and any reaffirmation dates.

Case N-498-1 (2) The boundary subject to test pressurization

',Alternative Rules for 10-Year System Hydrostatic during the system pressure test shall extend to all Testing for Class 1, 2, and 3 Systems Class 2 components included in those portions of sys-Section XI, Division 1 tems required to operate or supportthe safety system function up to and including the first normally closed Inquiry: What alternative rules may be used in lieu valve, including a safety or relief valve, or valve ca-of those required by Section XI, Division 1, Table pable of automatic closure when the safety function IWB-2500-1, Category B-P, Table IWC-2500-1, Cat- is required.

egory C-H, and Table IWD-2500-1, Categories D-A, (3) Prior to performing the VT-2 visual exami-D-B, and D-C, as applicable, for the 10-year system nation, the system shall be pressurized to nominal.

hydrostatic test? 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-sulated systems and 10 minutes for noninsulated sys-tems. The system shall be maintained at nominal op-erating pressure during performance of the VT-2 Reply: visual examination.

(a) It is the opinion of the Committee that as an (4) The VT-2 visual examination shall include alternative to the 10-year system hydrostatic test re- all components within the boundary identified in quired by Table IWB-2500-1, Category B-P, the fol- (b)(2) above.

lowing rules shall be used. (5) Test instrumentation requirements of IWA-(1) A system leakage test (IWB-5221) shall be 5260 are not applicable.

conducted at or near the end of each inspection 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 pressurization quired by Table IWD-2500-1, Categories D-A, D-B, during the system leakage test shall extend to all or D-C (D-B for the 1989 Edition with the 1991 and Class 1 pressure retaining components within the sys- subsequent Addenda), as applicable, the following tem boundary. rules shall be used.

(3) Prior to performing the VT-2 visual exami- (1) A system pressure test shall be conducted at nation, the system shall be pressurized to nominal or near the end of each inspection interval or during 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 inspection period of each inspection inter-systems and 10 minutes for noninsulated systems. val of Inspection Program B.

The system shall be maintained at nominal operating (2) The boundary subject to test pressurization pressure during performance of the VT-2 visual ex- during the system pressure test shall extend to all amination. Class 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 hydrostatic test function up to and including the first normally closed curve as contained in the plant Technical Specifica- valve, including a safety or relief valve, or valve ca-tions. pable of automatic closure when the safety function (5) The VT-2 visual examination shall include is required.

all components within the boundary identified in (3) Prior to performing the VT-2 visual exami-(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 5260 are not applicable. systems and 10 minutes for noninsulated systems.

(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-2500-1, Category C-H, the fol- amination.

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

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

849 SUPP. 9 - NC L