ML20155E590
| ML20155E590 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 10/30/1998 |
| From: | Feigenbaum T NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NYN-98126, NUDOCS 9811050111 | |
| Download: ML20155E590 (7) | |
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t-North Atlantic Energy Senice Corporation North io i'>x am 2
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i The Northeast Utilities Spiem October 30,1998 Docket No. 50-443 NYN-98126 AR#98019275-01 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Seabrook Station
' Inservice inspection Procram Relief Reauest IR-8 Revision 1 Enclosed, please fmd Inservice Inspection Program Relief Request IR-8 Revision 1. This relief request is being requested pursuant to 10 CFR 50.55a(a)(3)(i) on the basis that the proposed alternative will provide an acceptable level of quality and safety. North Atlantic Energy Service Corporation (North Atlantic) forwarded Revision 0 of this relief request by letter (NYN-98081) dated June 17,1998. In response to NRC staff questions pertaining to the specific section of the NRC' regulations that IR-8 was being requested for, North Atlantic agreed to revise Relief Request IR-8 and submit additional pertinent information to support the revised basis for relief, i
North Atlantic requests NRC review and approval of this relief request by December 11,1998 to j
support planning and scheduling work scope activitics for the upcoming sixth refueling outage (OR06).
Should you require further information regarding this
- matter, please contact Mr. Terry L. Harpster, Director of Licensing Services at (603) 773-7765.
1 Very truly yours, NORTH ATLANTIC ENERGY SERVICE CORP.
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- W Ted C. Feigenbat Executive Vice resident and
.,uuous-Chief Nuclear Officer i
cc:
H.J.' Miller,NRC Regional Administrator W. T. Harrison,' NRC Project Manager, Project Directorate 1-3 R. K. Lorson, NRC Senior Resident inspector 9811050111 991030 I
PDR ADOCK 05000443 1
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t ENCLOSURE 1 TO NYN-98126
NYN-98126 / Page 1 of 3 North Atlantic Energy Service Corporation Seabrook Unit 1 First Ten-Year Interval Relief Request Nu:nber IR-8 Revision i
- 1. Components For Which Reliefis Reauested:
Thirty Three (33) ASME Class 1 Valves
- 2. Component ID No's:
See attached list.
- 3. ASME Code Class:
1
- 4. Examination Category:
B-M-2, Item B12.50
- 5. Code Reauirement:
ASME B&PV Code Section XI,1983 Edition through Summer 1983 Addenda, Table IWB-2500-1, Item No. B12.50 requires a visual examination (VT-3) of the intemal surfaces on valve bodies excee "ng 4" nominal pipe size (NPS).
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Examinations are I..nited to one valve within each group of valves that are of the same constructional design (such as globe, gate, or check valve) and manufacturing method, and that perform similar functions in the system (such as containment isolation and system overpressure protection).
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- 6. Basis for Relief:
Relief is being requested pursuant to 10CFR50.55a(a)(3)(i) on the basis that the proposed alternative will provide an acceptable level of quality and safety. North Atlantic proposes to utilize the 1989 Edition of the ASME Boiler and Pressure Vessel Code,Section XI, Table IWB-2500-1, item B12.50 in lieu of the requirements specified in the 1983 Edition (including Addenda through Summer 1983) of Section XI, Table IWB-2500-1, item B12.50
. to perfonn a visual examination (VT-3) of the subject Class 1 valves.
Compliance with the 1983 Edition of the Code (including Addenda through Summer 1983) would require the disassembly.of six Class 1 valves (one valve within each group of valves) during each 10-year inspection interval. Disassembly of the subject valves for the sole x
NYN-98126 / Page 2 of 3 p'urpose of perfbrming a visual examination (VT-3) of the internal surfaces of the valves is not desirable. The general mechanical and structural condition of the subject valves is periodically monitored. The operational readiness of the subject valves with the exception of RII-V-59, Ril-V-61, Ril-V-63 and Ril-V-65 is verified on a periodic basis by exercising the valves to the open and closed position in accordance with the Seabrook Inservice Test (IST)
Program.
Ril-V-59, Ril-V-61, Ril-V-63 and Ril V-65 are manual valves which are normally locked open during plant operation and shutdown periods and do not have an active safety function to change position. Seal leakage integrity of the check valves listed on the attached sheet and motor-operated valves RC-V-22, RC-V-23, RC-V-87 and RC-V-88 are periodically leakage tested due to their reactor coolant pressure isolation function in accordance with Seabrook Station Technical Specification 3.4.6.2. Additionally, the structural integrity of the subject valves is assured because they are located within the reactor coolant system pressure boundary and boundary leakage is also required to be monitored during plant operation in accordance with Seabrook Station Technical Specification 3.4.6.2.
As identified in 10 CFR 50.55a(b)(2), the NRC has approved the general use of the 1989 Edition of the ASME Boiler and Pressure Vessel Code,Section XI lbr inservice inspection activities. Examination of the subject valves in accordance with the requirements outlined in the 1989 Edition of Section XI combined with the operational readiness testing, seat leakage testing and on-line reactor coolant boundary leakage monitoring performed by North Atlantic provides an acceptable alternative to the examination requirements imposed for the subject valves by the 1983 Edition (including Addenda through Summer 1983) of Section XI.
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- 7. Altemative Examination:
North Atlantic will perform a VT-3 visual examination of Class 1 valves as specified in Table IWB-2500-1, item B12.50 of the 1989 Edition of the ASME Boiler and Pressure Vessel Code,Section XI when a Class 1 valve is disassembled for maintenance, repair or volumetric examination utilizing the non-destructive examination methods and criteria of the 1983 Edition of the ASME Boiler and Pressure Vessel Code,Section XI including Addenda through the Summer of 1983.
- 8. Imnlementation Period:
This relief request will be implemented during the 1" 10-Year Inservice inspection Interval.
Enclosure i NYN-98126 / Page 3 of 3 Class 1 Valve Grouping Group No.
System Valve No.
Description i
Reactor Coolant RC-V-22 12" Motor-Operated Gate Valve RC V-23 RC-V-87 RC-V 88 2
Reactor Coolant RC-V-l l 5 6" Safety Valve RC-V-I l 6 RC-V-l l 7 3
Residual lleat Removal Ril-V-15 6" Check Valve Ril-V-29 Ril V-30 Ril-V 31 Ril-V-52 Ril-V-53 l
Ril-V-50 8" Check Valve l
Ril-V-51 l
4 Residual lleat Removal Ril V-59 6" Manual-Operated Gate Valve Ril V-61 Ril V-63 Rl-1-V-65 6
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Safety Injection SI-V 3 10" Motor-Operated Gate Valve SI-V-17 SI V-32 SI V-47 6
Safety injection SI V-5 10" Check Valve SI V-6 SI V-20 l
SI V 21 i
SI V-35 SI-V-36 SI-V-50 SI-V-51 SI-V-82 6" Check Valve j-SI-V-87 4
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e ENCLOSURI' 2 TO NYN-98126
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NYN-98126 / Page 1 of 1 l
NRC Commitments Contained in NYN-98126 t
l AR#98019275 Description of Commitment i
l Assignment 02 Upon NRC approval of ISI Program Relief Request IR-8, Rev.1, revise the ISI program to perform VT-3 visual examination of class I valves as i
l specified in Table IWB 2500-1, Item B12.5 of the 1989 Edition of the ASME B&PV Code when a Class 1 valve is disassembled for maintenance, repair, or volumetric examination in lieu of the 1989 Edition of the Code.
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