ML17277B153
| ML17277B153 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 12/05/1983 |
| From: | Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0892, RTR-NUREG-892 GO2-83-1114, NUDOCS 8312130254 | |
| Download: ML17277B153 (8) | |
Text
vi REGULATORY ORNATION DISTRIBUTION SYS9 (RIBS)
S ACCESSION NBR:8312130254 DOCBDATE: 83/12/05 NOTARIZED'O DOCKET FACIL:50 397 WPPSS Nuclear Projecti Unit 2i Washington Public Powe 05000397 AUTH'AME AUTHOR AFFILIATION SORENSENiG C,
Washington Public Power Supply System RECIPBNAME.
RECIPIENT AFFILIATION SCHWENCER,A, Licens'ing Branch 2
SUBJECT:
Confirms-that solenoid valves on all MSIV actuators replaced w/qualiffed unitsiper SER,(NUREG 089?iSuppl 3)>
DISTRIBUTION CODE:
B0010 COPIES RECEIVED( LTR J ENCL SIZE:.
TITLEj Licensing Submittal:
PSAR/FSAR Amdts 8, Related orrespondence NOTES!
REC IPIENT ID CODE/NAME NRR/DL/ADL NRR LB2 LA INTERNAL: ELD/HDS2 IE/DEPER/EPB 36 IE/DEQA/QAB 21 NRR/DE/CEB 11 NRR/DE/EQB 13 NRR/DE/MEB 18 NRR/DE/SAB 24 NRR/DHFS/HFEB40.
NRR/DHFS/PSRB NRR/DSI/AEB 26 NRR/DSI/CPB 10 NRR/DSI/ICSB 16 NRR/DSI/PSB 19 NRA/DS I/RSB 23 RGN5 EXTERNAL: ACRS 41 DMB/DSS (AMDTS)
LPDR 03 NSIC 05 COP IFS LTTR ENCL 1
0 1
0 1
0 3,
3 1
1 1
1 2
2 1
1 1
1 1
1 1
1 1
1 1
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1 1
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1 1
RECIPIENT ID CODE/NAME NRR LB2" BC AULUCKgR~
01 IE FILE IE/DEPER/IRB 35 NRR/DE/AEAB NRR/DE/EHEB NRR/DE/GB 28 NRR/DE/MTEB 17 NRR/DE/SGEB 25 NRR/DHFS/LQB 32 NRR/DL/SSPB NRR/DS I/ASB NRR/DS I/CSB 09 NRR/DSI/METB 12 RAB 22 EG FI 04 AMI/MI8 BNL(AMDTS ONLY)
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1.
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2 2
1 1
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1'OTAL NUMBER OF COPIES REQUIRED ~
L'TTR 53 ENCL 46
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Washington Public Power Supply System P.O. Box 968 3000 George Washington Way Richland, Washington 99352 (509) 372-5000 83i2130254 83i205 PDR ADQCK 05000397 E
PDR December 5,
1983 G02-83-1114 Docket No. 50-397 Director of Nuclear Reactor Regulation Attention:
Mr. A. Schwencer, Chief Licensing Branch No.
2 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Schwencer:
Subject:
NUCLEAR PROJECT 2
MAIN STEAM ISOLATION VALVE ACTUATOR SOLENOID VALVE REPLACEMENT
Reference:
Safety Evaluation Report related to the Operation of Supply System Nuclear Project No. 2, Docket No. 50-397, NUREG-0892, Supplement No. 3, dated May 1983 As directed 4n Section 3. 10.2.2 of the reference
- document, the Supply System confirms that the solenoid valves on all main steam isolation valve actuators have been replaced with qualified units, Asco Model NP8323A20E.
Very truly yours, G.
C. Sorensen, Manager Regulatory Programs KRW/sms cc:
R Auluck -
NRC WS Chin
- BPA A
Toth NRC Site
31.059 Page 1 of 2 Your response to Item 031.001(h) presents a new design for the logic of the main steam line isolation valves which is different from that reviewed and accepted for licensing on similar boiling water reactors.
Provide the manufacturing drawings for ASCO Valve No. 832320.
Additionally, provide the results of the engineering analysis and the test results which demon-strate the ASCO Valve No. 832320:
(1) is qualified for the environment in the drywell following a loss-of-coolant accident; (2) is seismically qualified; (3) meets the physical separation and the required electrical independence in accordance with the staff positions contained in Regulatory Guide 1.75; (4) satisfies the single failure criterion (previous designs accepted for licensing have used two separate valves in a one-out-of-two logic for a reactor trip).
Note that Table 1.6-1 of the FSAR states that the GE Topical Report, APED-5750, is applicable to the WNP-2 facility and that Table 7. 1-1 indicates the main.steam line isolation valves are designed and supplied by GE.
Accordingly, provide justification for the change to the design which was previously reviewed and approved by the staff in our evaluation of the GE Topical Report, APED-5750.
~Res onss:
The main steam line isolation valve logic is the same for WNP-2 as that.
supplied for previously reviewed and accepted for licensing BWRs.
(1)
The equipment qualification reevaluation effort at WNP-2 determined that the solenoid pilot valves on the main steam isolation valve required replacement in order to provide units qualified for the environment potentially experienced.
The replacement valves are Asco fkodel NP8323A20E.
Environmental qualification information for these valves are included in the Supply System's Environmental gualifica-tion Report referenced in Section 3.11.
(2)
The original solenoid valve was qualified for original seismic requirement when tested with complete valve (Wyle Laboratories--
Seismic Simulation Test Report 842610-1, dated 2/27/74).
The solenoid valve remained functional during all phases of the testing.
Reevalu-ation of the seismic qualification followed the decision to replace the valve with tlodel NP8323A20E.
The replacement valve was determined to be qualified and the qualification documentation is maintained in the Supply System qualification program files.
(3)
The protection system criteria of IEEE 279-j.97l are met with, this design; the requirements of Regul'atory Guide 1.75 were not comitted for this plant,
- however, the design and installation meets the sepa-ration criteria established for this plant.
0, k
Page 2 of 2 (4)
The ASCO valves in question are not used in generating a reactor trip.
The ASCO valves are used in a two-out-of-two logic for each NSIV.
That is, in order for each tlSIV to be isolated both ASCO solenoids must deenergize.
The ASCO valves themselves are not single fai lure proof.
Single failure criterion is preserved since each main steam line contains two valves in series.
If a single failure occurs in one valve scheme the second will provide isolation.
There is no deviation from the commitments made in APED-5750.
Because the decision to replace the valves has been
- made, the qualifica-tion concern is satisfied and the need for valve drawings is presumed to no longer exist.
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