ML18152B764
| 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 Attention: Document Control Desk Washington, D. C. 20555 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 1 INSERVICE INSPECTION PROGRAM ASME CODE CASE N-498-1 Serial No.:
98-352 NL&OS/GDM: RO Docket No.:
50-280 License No.:
DPR-32 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 f
determined by the ASME Code. consensus process.
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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 L
CASE N-498-1 CASES OF ASME BOILER AND PRESSURE VESSEL CODE Approval [?ate: May 11, 1994 See Numerical Index for expiration and any reaffirmation dates.
Case N-498-1
',Alternative Rules for 10-Year System Hydrostatic Testing for Class 1, 2, and 3 SystemsSection XI, Division 1 Inquiry: What alternative rules may be used in lieu of those required by Section XI, Division 1, Table IWB-2500-1, Category B-P, Table IWC-2500-1, Cat-egory C-H, and Table IWD-2500-1, Categories D-A, D-B, and D-C, as applicable, for the 10-year system hydrostatic test?
Reply:
(a) It is the opinion of the Committee that as an alternative to the 10-year system hydrostatic test re-quired by Table IWB-2500-1, Category B-P, the fol-lowing rules shall be used.
(1) A system leakage test (IWB-5221) shall be conducted at or near the end of each inspection in-terval, prior to reactor startup.
(2) The boundary subject to test pressurization during the system leakage test shall extend to all Class 1 pressure retaining components within the sys-tem boundary.
(3) Prior to performing the VT-2 visual exami-nation, the system shall be pressurized to nominal 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 systems and 10 minutes for noninsulated systems.
The system shall be maintained at nominal operating pressure during performance of the VT-2 visual ex-amination.
(4) Test temperatures and pressures shall not exceed limiting conditions for the hydrostatic test curve as contained in the plant Technical Specifica-tions.
(5) The VT-2 visual examination shall include all components within the boundary identified in (a)(2) above.
(6) Test instrumentation requirements of IWA-5260 are not applicable.
(b) It is the opinion of the Committee that, as an alternative to the 10-year system hydrostatic test re-quired by Table IWC-2500-1, Category C-H, the fol-lowing rules shall be used.
(1) A system pressure test shall be conducted at or near the end of each inspection interval or during the same inspection period of each inspection inter-val of Inspection Program B.
849 (2) The boundary subject to test pressurization during the system pressure test shall extend to all Class 2 components included in those portions of sys-tems required to operate or supportthe safety system function up to and including the first normally closed valve, including a safety or relief valve, or valve ca-pable of automatic closure when the safety function is required.
(3) Prior to performing the VT-2 visual exami-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-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 visual examination.
(4) The VT-2 visual examination shall include all components within the boundary identified in (b)(2) above.
(5) Test instrumentation requirements of IWA-5260 are not applicable.
(c) It is the opinion of the Committee that, as an alternative to the 10-year system hydrostatic test re-quired by Table IWD-2500-1, Categories D-A, D-B, or D-C (D-B for the 1989 Edition with the 1991 and subsequent Addenda), as applicable, the following rules shall be used.
(1) A system pressure test shall be conducted at or near the end of each inspection interval or during the same inspection period of each inspection inter-val of Inspection Program B.
(2) The boundary subject to test pressurization during the system pressure test shall extend to all Class 3 components included in those portions of sys-tems required to operate or support the safety system function up to and including the first normally closed valve, including a safety or relief valve, or valve ca-pable of automatic closure when the safety function is required.
(3) Prior to performing the VT-2 visual exami-nation, the system shall be pressurized to nominal 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 systems and 10 minutes for noninsulated systems.
The system shall be maintained at nominal operating pressure during performance of the VT-2 visual ex-amination.
(4) The VT-2 visual examination shall include all components within the boundary identified in (c)(2) above.
(5) Test instrumentation requirements of IWA-5260 are not applicable.
SUPP. 9 -
NC