ML18153B285

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Forwards Second 10-yr ISI Interval Relief Requests 28,29,24, 25 & 26.Second Interval Insp Requirements Scheduled to Be Completed in Refueling Outages Currently Scheduled to Start in Feb 1994 & Sept 1994 for Units 1 & 2,respectively
ML18153B285
Person / Time
Site: Surry  Dominion icon.png
Issue date: 08/11/1993
From: Stewart W
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
93-419, NUDOCS 9308160215
Download: ML18153B285 (18)
v • d • e


Text

e e VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 August 11, 1993 United States Nuclear Regulatory Commission Serial No.93-419 Attention: Document Control Desk SPS/ETS Washington, D. C. 20555 Docket Nos. 50-280 50-281 License Nos. DPR-32 DPR-37 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 SECOND TEN YEAR INSERVICE INSPECTION INTERVAL RELIEF REQUESTS Surry Power Station Units 1 and 2 are currently in the third period of their second ten year intervals. Second interval inspection requirements are scheduled to be completed in the refueling outages currently scheduled to start in February 1994 and September 1994 for Surry Units 1 and 2, respectively. Previously by letter dated January 26, 1993 (Serial No.93-002), relief requests were submitted to close out the second ten year interval. Pursuant to 10 CFR 50.55a(g)(5), additional relief from specific Code requirements for Surry Units 1 and 2 is being requested. The basis for each relief request is provided in the Attachments to this letter.

In addition, Relief Request 24 for Surry Unit 2 is being resubmitted to incorporate components not included in the January 26, 1993 letter, that were replaced during the recent Unit 2 refueling outage.

These requests have been reviewed by the Station Nuclear Safety and Operating Committee.

If you have questions regarding this information, please contact us.

Very truly )'?u\s,

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cc: U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W.

Suite 2900 Atlanta, Georgia 30323 Mr. M. W. Branch NRC Senior Resident Inspector Surry Power Station

Attachment 1 Surry Unit 1 ISi Relief Requests

RELJ:EF REQUEST 28 I. IDENTIFICATION OF COMPONENTS Class 1, 2, and 3 components II. IMPRACTICAL CODE REQUIREMENTS IWA-4000 and IWA-5214 require a hydrostatic pressure test in accordance with IWB-5000, IWC-5000, or IWD-5000 following welded repairs or installation of replacement items by welding.

III. BASIS FOR RELIEF In past situations our utility has been required to defer or ask relief from ASME Section XI hydrostatic tests following repair or replacement activities due to various reasons, which identified a basis of impracticality. This has ranged from boundary valve isolation problems to incorporation of the steam generators in the test boundaryg These situations have necessitated in some cases immediate communication with and approval from the NRC, so that start-up delays or LCO conditions could be avoided. Test deferrals, like those associated with the steam generator, eventually must be conducted, and are considered inordinately burdensome, considering that the 10-year hydrostatic tests have been eliminated for Class 1 and 2 systems with the* approval in Regulatory Guide 1.147, Code Case N-498, 11 Alternative Rules for 10-year Hydrostatic Pressure Testing for Class 1 and 2 Systems,Section XI, Division 1. 11 The Code has recognized that alternative rules should be available to hydrostatic testing to allow an option to the owner. They have developed Code Case N-416-1, "Alternative Pressure Test Requirement for Welded Repairs or Installation of Replacement Items by Welding." This Code Case as of this writing has been passed by Section XI and has been sent up to Main Committee for approval. Accordingly, it is considered impractical to maintain only the hydrostatic test option.

IV. ALTERNATE TESTING In situations following welded repairs or installation of replacement items by welding, when the hydrostatic test required by IWA-4000 or IWA-5214 is not performed, the following alternative requirements shall be applied:

1) NDE shall be performed in accordance with the methods and acceptance criteria of the applicable Subsection of the 1989 Edition of ASME Section III. Additionally, where no .

construction NDE is required on partial and full penetration welds greater than 1 inch nominal pipe size, these welds shall receive a surface examination as a minimum.

RELIEF REQUEST 28 (COlf 1 T)

. 2) Prior to or immediately upon return to service, a VT-2 visual examination shall be performed in conjunction with a system pressure test, using the 1989 Edition of Section XI, in accordance with IWA-5000, at nominal operating pressure and temperature.

3) Use of this alternative shall be documented on the NIS-2 Form.

If the original Code Case N-416 was used to defer a Class 2 hydrostatic test, the deferred test may be eliminated when the requirements of this alternative testing *have been met.

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RELIEF REQUEST 29 I. IDENTIFICATION OF COMPONENTS Component(s): Piping between following check valves located on station prints:

11448-CBM-89B 1-SI-79 AND 1-SI-235, 1-SI-241 1-SI-82 AND 1-SI-236, 1-SI-242 1-SI-85 AND 1-SI-237, 1-SI-243 1-SI-88 AND 1-SI-238 1-SI-91 AND 1-SI-239 1-SI-94 AND 1-SI-240 (Drawings Attached)

Function  : Safety Injection System Class  : 1 II. IMPRACTICAL CODE REQUIREMENTS Class 1 System Hydrostatic Test, IWB-5222, as modified by Code Case N-498.

III. BASIS FOR RELIEF The double check valve combination prevents pressurization of the area in between the check valves when conducting pressure tests on the primary system.

IV. ALTERNATE TESTING During the performance of the Class 1 Code Case N-498 pressure test, the area described above will be tested at a pressure 100 psig less than the RCS normal operating pressure. The establishment of a 100 psig differential pressure across the affected valves would prevent any uncontrollable dilution of the primary during testing.

This alternative test would replace the provisions listed in the current Relief Request 1 of our ISI program.

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e Attachment 2 Surry Unit 2 ISi Relief Requests

e Relief Request 24 I. IDENTIFICATION OF COMPONENTS system: Main Steam Feedwater Components: Valves listed:

Component Mark# Line# SIG Class Valve 2-FW-30* 3 11 -WAPD-109-601 A 2 Valve 2-MS-84. 6"-SHP-145-601 A 2*

Valve 2-MS-119 4 11 -SHP-138-601 B 2 Valve 2-FW-61* 3 11 -WAPD-111-601 B 2 Valve 2-MS-155 6 -SHP-147-601 11 C 2 (Drawings attached)

III. BASIS OF RELIEF The identified component was replaced under the rules of ASME Section XI. IWA-4400 of the Code requires that a hydrostatic test be conducted on certain welded repairs or replacements.

This replacement cannot be hydrostatically tested without hydrostatically testing the connecting steam generator, as no intermediate isolation exists.

Prior to NRC and Code approval of Code Case N-416, relief requests were routinely written and approved for this type situation. The relief requests were based upon the difficulties associated with steam generator hydrostatic testing. The test cannot be conducted at ambient conditions due to fracture prevention concerns associated with the Surry steam generators, which results in difficult monitoring and controlling requirements. The Surry steam generators are required to be a minimum of 150 degrees F. on the secondary side and a minimum of 180 degrees F. on the primary side. Additionally normal problems, such as test boundary isolation, internal boundary leakage, placing spring hanger stops for dead weight loading concerns, and test pump size requirements further increase the difficulties associated with this particular test.

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  • ' Relief Request 24 (CON 1 T)

The test pressure of 1356 psig also requires gaging or removal of the Main Steam Safety valves, which initially lift at 1085 psig. Some examples of previous correspondence requesting relief and approval follow:

VEPCO Letter/ Date NRC Letter/ Date Serial# 88-725/ 1/9/89 Serial# 89-278/ 4/7/89 Serial# 89-636/ 8/29/89 Serial# 89-734/10/2/89 Serial# 87-056/ 2/13/87 Serial# 88-419/6/17/88

IV. ALTERNATE TESTING The alternative requirements described in Code Case N-416, a volumetric examination of the full penetration welds and a visual examination (VT-2) at nominal operating pressure was previously performed and deemed acceptable.

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Relief Request 25 I. IDENTIFICATION OF COMPONENTS Class 1, 2, and 3 components II. IMPRACTICAL CODE REQUIREMENTS IWA-4000 and IWA-5214 require a hydrostatic pressure test in accordance with IWB-5000, IWC-5000, or IWD-5000 following welded-repairs or installation of replacement items by welding.

III. BASIS FOR RELIEF In past situations our utility has been required to defer or ask relief from ASME section XI hydrostatic tests following repair or replacement activities due to various reasons, which identified a basis of impracticality. This has ranged from boundary valve isolation problems to incorporation of the steam generators in the test boundary. These situations have necessitated in some cases immediate communication with and approval from the NRC, so that start-up delays or LCO conditions could be avoided. Test deferrals, like those associated with the steam generator, eventually must be conducted, and are considered inordinately burdensome, considering that the 10-year hydrostatic tests have been eliminated for Class 1 and 2 systems with the approval in Regulatory Guide 1.147, Code Case N-498,"

Alternative Rules for 10-year Hydrostatic Pressure Testing for Class 1 and 2 Systems,Section XI, Division 1. 11 The Code has recognized that alternative rules should be available to hydrostatic testing to allow an option to the owner. They have developed Code Case N-416-1, "Alternative Pressure Test Requirement for Welded Repairs or Installation of Replacement Items by Welding." This Code Case as of this writing has been passed by Section XI and has been sent up to Main Committee for approval. Accordingly, it is considered impractical to maintain only the hydrostatic test option.

IV. ALTERNATE TESTING In situations following welded repairs or installation of replacement items by welding, when the hydrostatic test required by IWA-4000 or IWA-5214 is not performed, the following alternative require~ents shall be applied:

1) NOE shall be performed in accordance with the methods and acceptance criteria of the applicable Subsection of the 1989 Edition of ASME Section III. Additionally, where no construction NDE is required on partial and full penetration welds greater than 1 inch nominal pipe size, these welds shall receive a surface examination as a minimum.

e e Relief Request 25 (CON'T)

2) Prior to or immediately upon return to service, a VT-2 visual examination shall be performed in conjunction with a system pressure test, using the 1989 Edition of Section XI, in accordance with IWA-5000, at nominal operating pressure and temperature.
3) Use of this alternative shall be documented on the NIS-2 Form.

If the original Code Case N-416 was used to defer a Class 2 hydrostatic test, the deferred test may be eliminated when the requirements of this alternative testing have been met.

RELIEF REQUEST 26 I. IDENTIFICATION OF COMPONENTS Component(s): Piping between following check valves located on station prints:

11548-CBM-89B 2-SI-79 AND 2-SI-235, 2-SI-241 2-SI-82 AND 2-SI-236, 2-SI-242 2-SI-85 AND 2-SI-237, 2-SI-243 2-SI-88 ,AND 2-SI-226, 2-SI-227 AND 2-SI-238 2-SI-91 AND 2-SI-226, 2-SI-227 AND 2-SI-239 2-SI-94 AND 2-SI-226, 2-SI-227 AND 2-SI-240 (Drawings Attached)

Function  : Safety Injection System Class  : 1 II. IMPRACTICAL CODE REQUIREMENTS Class 1 System Hydrostatic Test, IWB-5222, as modified by Code Case N-498.

III. BASIS FOR RELIEF The double check valve combination prevents pressurization of the area in between the check valves when conducting pressure tests on the primary system.

IV. ALTERNATE TESTING During the performance of the Class 1 Code Case N-498 pressure test, the area described above will be tested at a pressure 100 psig less than the RCS normal operating pressure. The establishment of a 100 psig differential pressure across the affected valves would prevent any uncontrollable dilution of the primary during testing.

This alternative test would replace the provisions listed in the current Relief Request 1 of our ISI program.

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