ML17146A718
| ML17146A718 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 02/18/1987 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17146A717 | List: |
| References | |
| NUDOCS 8703020327 | |
| Download: ML17146A718 (10) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO THE INSERVICE INSPECTION PROGRAM AND RE UESTS FOR RELIEF PENNSYLVANIA POWER AND LIGHT COMPANY SUS UEHANNA STEAM ELECTRIC STATION UNIT 1 DOCKET NO. 50-387 INTRODUCTION The Technical Specification for the Susquehanna Steam Electric Station Unit 1 states that inservice examination of ASME Code Class 1, 2, and 3 components shall be performed in accordance with 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.
Some plants were designed in conformance to early editions of this Code Section, consequently certain requirements of later editions and addenda of Section XI are impractical to perform because of the plants'esign, component
- geometry, material of construction or the need for extensive temporary modifications and the resultant substantial exposure to plant personnel.
Regulation 10 CFR 50.55a(g)(6)(i) authorizes the Commission to grant relief from those requirements upon making the necessary findings.
By letters dated June 30, 1983, December 19, 1984, and August 12, 1986, Pennsylvania Power and Light Co.
(PPSL) submitted its inservice inspection pro-
- gramm, and additional information related to requests for relief from certain Code requirements determined to be impractical to perform on the Susquehanna Steam Electric Station Unit 1 during the first inspection interval.
The program is b'ased on the requirements of the 1980 Edition through Winter 1980 Addenda of Section XI of the ASME Code, and remains in effect until June 8, 1993, unless
.the program is modified or changed prior to the interval end date.
EVALUATION The inservice inspection program and the results for relief from the requirements of Section XI that have been determined to be impractical to perform have been reviewed by the staff's contractor, Science Applications International Corporation (SAIC).
The contractor's Technical Evaluation Report (TER) is attached.
The staff has reviewed the TER and agrees with and adopts the evaluations and conclu-sions.
The relief request determinations made by the staff are summarized in attachment 1.
The granting of relief is based upon the fulfillment of commitments made by the licensee in its basis for the relief request and the alternate proposed examination.
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CONCLUSION Based on the review, the staff concludes that the relief from the code-required examination and testing may be granted provided the alternate methods imposed through this document are followed.
The staff further concludes that the licensee's inservice inspection program will still provide reasonable assurance of the piping and component pressure boundary structural integrity.
During the review of the licensee's inservice inspection plan, the staff has not identified any significant misinterpretation or omissions of Code requirements.
Thus, the inservice inspection plan is acceptable for implementation.
Principal Contributor:
B. Turovlin, NRR
ATTACHMENT 1 TABLE 1 CLASS 1 COMPONENTS LICENSEE'S IWB-2500-1 RE UEST NO.
ITEM NO.
IWB-2500 EXAM CAT.
SYSTEM OR COMPONENT AREA TO BE EXAMINED LICENSEE PROPOSED REQUIRED ALTERNATE RELIEF REQUEST METHOD EXAMINATION STATUS 1RR"11
- 81. 11 B-A Reactor Vessel Circumferen-tial Shell welds AD Volumetric 80X of weld Granted AD with special wedge Bl. 12 Longitudinal Shell Welds BK and BM Volumetric None Granted 1RR"7 1RR-10 B3.90 B9.10 B9.1159.12 B-D 8-J Reactor Vessel Piping Selection Nozzle-to" Vessel Welds Nominal Pipe Size 4 in.
8 Greater, B9.11:.
Circumfer-ential Welds, B9.12: Longi-tudinal Welds.
Volumetric Surface 8
Volumetric Periodic System Leakage Test*
(Category B-P) and Inservice Hydrosta-tic Test" (Category B-P)
Granted Relief not needed for this (1st) interval only.
" These alternatives described by the licensee are already required by the code.
TABLE 1 CLASS 1 COMPONENTS (CONTINUED)
LICENSEE' IWB-2500-1 IWB-2500 RE UEST NO.
ITEM NO.
EXAM CAT.
SYSTEM OR COMPONENT AREA TO BE EXAMINED LICENSEE PROPOSED REQUIRED ALTERNATE RELIEF REQUEST METHOD EXAMINATION STATUS 1RR-10 1RR-6 B9.20 B9.21 B9. 22 B9. 30 B9.31 B9.32 B.9. 10 B-J B"J Piping Selection Branch Piping Connections Selection Reactor Recircu-lation System Nominal Pipe Size
< 4 in.
Circumfer-ential Welds Longitudinal Welds Nominal Pipe size
> 4 in.
Nominal Pipe size
< 4 in.
Sweepolet/
Reducers to Risers Sur face Volumetric and Surface Surface Volumetric and Surface Relief not needed for this (1st) interval only Same Same Same Visual Granted During Pressure Tests Volumetric to extent practical both radio-graphic and ultrasonic.
LICENSEE' IWB"2500-1 IWB-2500 RE UEST NO.
ITEM NO.
EXAM CAT.
- 86. 180 B"G-1 1RR-1 B12. 20 B-L-2 B12. 40 1RR"2 B-H-2 TABLE 1 CLASS 1 COMPONENTS (CONTINUED)
LICENSEE PROPOSED AREA TO BE REQUIRED ALTERNATE EXAMINED METHOD.
EXAMINATION SYSTEM OR COMPONENT RELIEF RE(VEST STATUS Pump Bolts and studs Volumetri c Volumetri c to the extent possible.
If pump di sassembl ed complete examination.
..Area. examined during system leakage test" and during system hydro-static test."
Granted All bolts and studs Any valve(s) or pump(s) disassembled have visual examination Granted Pump Casings Internal surfaces
- Visual, VT-3
- Visual, VT-3 Valve
- Bodies, Exceeding 4 in.
Internal surfaces P
Granted Same
TABLE 2 CLASS 2 COMPONENTS L.'.."Et!":E' IWB"2500-1 IWB-2500 RF~UESI NO.
ITEM NO.
EXAM CAT.
SYSTEM OR COMPONENT AREA TO BE EXAMINED LICENSEE PROPOSED REQUIRED ALTERNATE METHOD EXAMINATION RELIEF REQUEST STATUS 1RR-3 C5. 10 C-F C5.20 C5.31 Piping
<4 in.
Nominal wall thickness Piping >4 in. nominal Branch Pipe Connections Circumfer-Surface ential and welds Circumfer-Surface and and Longi-Volumetric tudinal welds Circumfer-Surface Welds Relief not needed for (1st) interval only 1RR-4 CG. 10 C-G Pumps Core Spray and RHR Pressure Retaining Pump Casing Welds Surface Visual when Granted disassembled for main-tenance.
Discharge elbow-to-sleeve forging weld Discharge elbow-to-sleeve plate flange weld Relief not needed welds are located within pressure boundary
}
TABLE 3 ASME CLASS 3 COMPONENTS -
NO PELIEF REQUESTS PRESSURE TESTS -
NO RELIEF REQUESTS
TABLE 4 CONPONENT SUPPORTS Licensee's Re uest No.
Code Re uirements Licensee's Proposed Alternative Examination Relief Re uest Status 1RR. 8 Non-Snubber Exem tion and Se ect on Crstersa IWF-1230 Su orts Exam t from Examination and Test:
~Exam tion I:- the course of preparation.
IMF-2510 Su orts Selected for Examination:
(a)
Component supports selected for examination shall be the supports of those components that are required to be examined under IMB, IMC, and IMD during the first inspection interval.
Component supports shall be exempt from the VT-3 and VT-4 examination requirements as follows:
(a)
Class 1 and 2 components which are exempt from surface and volumetric examination in accordance with IWB-1220 and IWC-1220, respectively, of the Code.
Granted Granted (b)
For multiple components within a system of similar
- design, function, and service, the supports of only one of the multiple components are required to be examined.
(b)
Class 3 components which are 4 inch nominal pipe size and smaller in accordance with IWD-1220.1 of the Code.
Selection Criteria Criteria for Class 1, 2 and 3 pipe supports not exempt from examination is based on statistical sampling.
TABLE 5 STANDARDS FOR EXAMINATION EVALUATIONS LICENSEE'S RELIEF RE UEST NO.
1RR"9 SYSTEM OR COMPONENT Snubbers 50 kips or greater Snubbers less than 50 kips REIERERERiNT In preparation Representative sample of 10X tested each inspection period.
LICENSEE PROPOSED ALTERNATIVE EXAMINATION Functional testing require-ments of Techni-cal Specification 3.4.7.4 VT"3 and VT-4 visual RELIEF REQUEST STATUS No relief required.
Testing per T.S.
should meet Code requirements if Licensee ensures that 10X of all snubbers rated less than 50 kips are examined.