ML20023D715
| ML20023D715 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 05/19/1983 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20023D711 | List: |
| References | |
| TAC-08295, TAC-8295, NUDOCS 8306020574 | |
| Download: ML20023D715 (9) | |
Text
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f SAFETY EVALUATION BY THE OFFICE OF NUCLExR REACTOR REGULATION RELATED TO REQUESTS FOR RELIEF FROM INSERVICE INSPECTION REQUIREMENTS Nebraska Public Power District Cooper Nuclear Power Station Docket No. 50-298 INTRODUCTION Technical Specification 4.6.G for the Cooper Nuclear Power Station states that inservice examination of ASME Code Class 1, 2, and 3 components shall be performed in accordanca xith Section XI of the ASME Boiler and Pressure Vessel Code and applicable addenda as required by 10 CFR 50.55a(g) except where specific written relief has been granted by the Commission.
Certain rv uire-ments of later editions and addenda of Section XI are impractical to perform on older plants becausa of the plants' design, component geometry, and i
materials of construction.
Thus, 10 CFR 50.55a(g)(6)(i) authorizes the Commission to, grant relief from those requirements upon making the necessary findings.-
By letters dated July 29,1977, Marchr 27, 1978, July 18, 1978, December 18, 1980 and March 29, 1982, Nebraska Public Power District submitted its inservice inspection program, revisions, or additional infomation related to requests for relief from certain Code requirements determined to be imprac-tical to perform on the Cooper Nuclear Station during the inspection interval.
The program is based on the 1974 Edition including Summer 1975 Addenda of Section XI of the ASME Code, and covers the last 80 months of the current 120-month inspection interval from November 1, 1977 to July 1, 1984.
8/ALUATION Requests for relief from the requirements of Section XI which have been determined to be impractical to perform have been reviewed by the Staff's contractor, Science Applications, Inc.
The contractor's evaluations of the licensee's requests for relief and his recommendations are presented in the i
Technical Evaluation Report (TER) attached (ATTACHMENT 1).
The staff has reviewed the TER and agrees with the evaluations and recommendations except in those cases where the recommendations to update to a later Edition of Section I
XL was equivalent to granting relief from the requirements of the 1974 Edition.
A summary of the determinations made by the staff is presented in the follow-ing tables:
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TABLE 1
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CLASS 1 COMPONENTS I
LICENSEE PROPOSED RELIEF IWB-2600 IWB-2500 SYSTEM OR AREA TO BE REQUIRED ALTERNATIVE REQUEST ITEM NO. EXAM. CAT. COMPONENT EXAMINED METHOD EXAM.
STATUS Bl.1 B-A Reactor Circumfer-Volumetric None GRANTED Vessel ential and PROVIDED Longitudinal ACCESSIBLE Welds in PARTS OF Beltline:
WELDS VCB-BA-2, VLA-BA-1, V LA-BA-1,2,3 2, AND 3
' VL8-BA-1,2,3 ARE EXAMINED TO EXTENT PRACTICAL DURING N0ZZLE EXAMINATIONS 81.2 B-B Reactor Circumfer-Volumetric None GRANTED Vessel ential &
PROVIDED Longitudinal LENGTH OF Welds in ACCESSIBLE Shell (otner CATEGORY B-B than BeltIine WELDS SUBJECT
& Flanges)
TO EXAMINA-and Meridional TION IS~
and Circumfer-INCREASED TO ential Seam MAXIMUM Welds in EXTENT Bottom Head PRACTICAL.
and Closure Head:
VC8-BB-1,3 y'
VLC-BB-1,2,3 HMB-BB-1,2,3 4,5 & 6 Bl. 4 B-D Reactor Closure Head Volumetric Surface GRANTED l
Vessel Nozzle Inner Closure Radii:
N6A Head N6B & N7 t
81.8 B-G-1 Reactor Closure Volumetric Surface GRANTED Vessel Nuts, when and Surface Only removed D
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~1 TABLE 1 CLASS 1 COMPONENTS LICENSEE PROPOSED -
RELIEF l
IWB-2600 IWB-2500 SYSTEM OR AREA TO BE REQUIRED ALTERNATIVE REQUEST ITEM NO. EXAM. CAT. COMPONENT EXAMINED METHOD EXAM.
STATUS B4.S B-J Piping Inaccessible Volumetric Visual GRANTED Welds in During PROVIDED Flued Heads Hydrostatic FIRST Tests ACCESSIBLE Pressure WELD IN PROCESS PIPE OUTSIDE PENETRATION I3 EXAMINED TO CODE REQUIPEMENTS B4.9
- Piping, Integrally-Volumetr!: Surface GRANTED B5.4 B-K-1 Pt.mps Welded BS. 4 Valves Supports 85.7' B-L-Z Puups Pump Visual Examine GRANTED-Casings Curing PROVIDED i
Internal Nafetenance MAINTENANCE Surfaces OCCURS PRIOR f0 END OF INTERVAL B6.7 B-M-Z Valves Valve Visual Examine-GRANTED
- Bodies, During PROVIDED Internal Maintenance MAINTENANCE Pressure OCCURS PRIOR Boundary TO END OF Surfaces INTERVAL l
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.i TABLE 2 CLASS 2 COMPONENTS LICENSEE PROPOSED RELIEF IWC-2600 IWC-2520 SYSTEM OR AREA TO BE REQUIRED ALTERNATIVE REQUEST ITEM NO. EXAM. CAT. COMPONENT EXAMINED METHOD EXAM.
STATUS C1.2 C-B Residual Nozzle-to-Volumetric Surface GRANTED Heat Vessel Examination Removal Welds:
of Reinforcing Heat RHR-CE-2A Ring-to-Vessel Exchang-
& RHR-CB-28 Welds and ers Visual During Hydrostatic Tests C1.4, C-D
- Vessals, Pressure-Visual and Requirements of GRANTED C2.4,
- Piping, Retaining Either Sur-1977 Edition, C3.4 &
Pumps &
Bol ting face or through Suecer C4.2 Valves Volumetric 1978 Addenda C2.1 C-F Piping Inaccess-Volumetric Visual Ouring GRANTED ible Weld ~
Hydrostatic irr FTcor-Test Penetratior::
RHC-CF-9 C2.1.
C-F Nitrogen Fillet Volumetric Surface GRANTED Primary Welds:
Contain-PNC-CG-20 ment PNC C3-21 Isolation PNC-CG-23 System PNC-CG-24 s
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TABLE 3 l
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CLASS 3 COMPONENTS l
(No Relief Requests) o 5
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TABLE 4 i
PRESSURE TEST h
f IWA-5000 IWB-5000 IWC-5000 &
LICENSEE PROPOSED RELIEF SYSTEM OR IWO-5000 TEST ALTERNATIVE REQUEST COMPONENT PRESSURE REQUIREMENT TEST PRESSURE STATUS (No Relief Requests)*
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- Note:
The licensee plans to submit additional relief requests relating -
l to the system pressure testing program.
The requests are not available at this time.
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TABLE 5 ULTRASONIC EXAMINATION TECHNIQUE LICENSEE PROPOSED SYSTEM OR ALTERNATIVE RELIEF REQUEST COMPONENT REQUIREMENT EXAMINATION METHOD STATUS Class 1 & 2 Article 5, 50% Recording Criteria GRANTED PROVIDED Piping (P.elief is ALL NON-GEOMETRIC requested from INDICATIONS 20% DAC, 20% Recording OR GREATER ARE Criteria RECORDED a
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TABLE 6 GENERAL RELIEF REQUESTS ALL CLASSES / COMPONENTS RELIEF LICENSEE REQUEST SYSTEM / COMPONENT REQUIREMENT ALTERNATE STATUS Class 1 Exempt IWB-1220(b)(1)
Exempt Under NOT REQUIRED Components (Pressure Retaining IWB-1220(b)(1)
COMPONENT Welds in CRDM Housing)
(Flow does not EXEMPT PER exceed 1.8" 10 CFR 50.55a diameter pipe)
FOOTNOTE 2 ms 8
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Based on the rev1ew summarized, the staff concludes that relief granted from the examination requirements and alternate methods imposed through this docu-ment give reasonable assurance of the piping and component pressure boundary and support structural integrity, that granting relief where the Code require-ments are impractical is authorized by law and will not endanger life or property, or the common defense and security, and is otherv;ise in the public interest considering the burden that could result if they were imposed on the facility.
Date:
Principal Contributor:
George Johnson
Attachment:
Technical Evaluation
? apart e
C.
1
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