ML20203N108
| ML20203N108 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 04/30/1986 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| SBN-1024, NUDOCS 8605050058 | |
| Download: ML20203N108 (6) | |
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SEABROOK STATION Engin23 ring Offica d
April 30, 1986 SBN-1024 PutWe W4New Hompg,De T.F.
199.99.10 vankee DWlalon h*nw Hampstilr?
United States Nuclear Regulatory Commission Washington, CC 20535 Attention:
Mr. Vincent E. Noonan, Project Director PWR Project Directorate No. 5 Ref e rances :
(a) Construrtion Permits CPPR-135 and CPPR-136, Docket Nos. 5a-443 and 50-444 (b) Enviroacental Qualification Site Audit dated February 24-27, 1986 (c) PSNH Letter (SBN-988) dated April 3,1986, " Environmental 4
Qualification:
Post Accident Operability Time",
J. DeVincentis to V. S. Noonan
(.i) PSF 1 Letter (SBN-998) dated April 10, 1986, " Response
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Environmental Qualification Audit Observation",
J. DeVincentis to V. S. Noonan (e) PSNH Letter (SBN-1006) dated April 16, 1986, "NRC Requests for Additional Information", J. DeVincentis to V. S. Noonan Subj ect :
Environmencel Qualification:
Post Accident Operability Time
Dear Sir:
In accordance with our conversation with your Mr. H. Walker on April 18, 1986 along with the completion of our E.Q. file review, several additional E.Q. files were determined to not meet the one year post-accident operability requirement a id should be added to the previously submitted list of files (References (c) and (d)].
E.Q. FILE POST ACCIDENT NUMBER NUMBER DESCRIPTION OPERATING TIHE OF ITEMS 113-03-01 Okonite 600V 30 days 3
Power Cable 113-17-01 Anaconda 600V 30 days 11 Control Cable 113-18-01 Anaconda 300V 30 days 1
Instrument Cable 113-20-01 ITT Suprenant 300V 30 days 2
Instrument Cable 172-01-01 Ceneral Atomic Radiation 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 1
Monitors & Detectors (Outside Containment)
(d 1.ts de Containment) 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> 2
B"O5050058 860430 PDR ADOCK 05030443 A
PDR l \\
Seabrook State 1 Construction Field Office
- P.O. Box 700 Soobrook, NH O3874 I
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United Stctco Nuclocr R:gulctory Commiccion Attention:
Mr. Vincent S. Noonan SBN-1024 In all the above cases, the post-accident operating time has additional margin to meet the performance margin requirements of IEEE 323, 1974.
The following is our engineering justification concerning the acceptability of the subject files.
POWER, CONTROL AND 1NSTRUMENT CABLES (Filee 113-03-01, 113-17-01, 113-18-01, and 113-20-01)
The power, control and instrument cables associated with valves SI-V-17, SI-V-32, and CS-V-149, are located inside the reactor contain-ment and are subject to submergence due to LOCA Flooding.
CS-V-149 is
- inboard letdown isolation valve and is required for letdown isolation w' containment isolation.
Our engineering atulysis conservatively hat.stermined valve closure, based on a spectrum of breaks, would occur in let shan ene minute. When this is added to the one hour increment required by Regulatory Guide 1.89, the resulting required life becomes 61 minutes which is much less than the qualified post-sccident operating time of 30 days. Once this valve has closed, it has performed its intended safety function and is not required again in the near term or for long term recovery operations.
Furthermore, long term f ailure of l
the cable does not result in a re-opening of the MOV.
SI-V-17 and SI-V-32 are accumulator tank isolation valves and are normally open during power operation (they also receive an SI signal to ope n).
Our engineering review has encompassed a full spectrum of LOCA breaks and our analysis has conservatively determined that these valves would per-form their safety function within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Furthermore, long term f ailure of the cables does nos result in a change in valve position. We have con-cluded that the 30-day post-accident operability qualification has sufficient margin to ensure the required safety function has been performed.
RADIKIION M0141 TORS (File 172-01-01)
The Radiation Monitors in question are located inside the reactor con-tainment as well as the containment enclosure.
Monitor Outside Containment The safety function of the radiation monitor, located inside the containmeat enclosure, 1s to alert the operator to a radiation release in the enclosure.
The monitor performs its safety function within minutes af ter a radiation re-lease has occurred.
When this is added to the one hour increment required by Reg. Guide 1.89, the resulting required life becomes 62 minutes which is less than the qualified post-accident operating time of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.
The radia-3 Rads, by the time it is subjected tion radiation monitor is qualified for 10 to this radiation level, it would have completed its safety function.
Long term loss of this equipment will not affect monitoring capability since re-lease information is provided by the wide-renge vent stack monitor.
Unit;d States Nucicar RIgulatory Commisalon Attention:
Mr. Vincent S. Noonan SBN-1024 Monitors Inside Containnent The safety function of the radiation monitors, located inside the con-tainment, are to alarm on high radiation levels and to isolate containment purge during a ref ueling operation.
In the event of a fuel handling accident inside the reactor contain-ment, operating procedures will require personnel to leave immediately and to isolate the containment purge system.
These monitors are backup to operator action. This response will occur within minutes af ter a fuel handling accident. When this is added to the one hour increment, required life becomes 62 minutes which is less than the qualified post-accident operating time of 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />.
Long term loss of this equipment does not af fect me..itoring capability since radiation levels are measured with the containment wide-range monitors.
We have enclosed a complete finalized list, Attachment 1, of all files which do not meet the one year post-accident operating time.
This list is a summary of 211 previous transmittals regarding this topic.
Note that Reference (c) contained a typographical error.
File 600-01-01 should have been 600-01-04.
This correction has been incorporated in Attachment 1.
Very truly yodrs, l (?sW s' gs(5, r hohnDeVincentis Director of Engineering Enclosure cc: Atomic Safety and Licensing Board Service List
s Dicn3 Curran, E: quire Calvin A. Cann g Harmon & Weiss City Manager 2001 S. Street, N.W.
City Hall Suite 430 126 Daniel Stre4t l'ashington, D.C.
20009 Portsmouth, NM 03801 Sherwin E. Turk, Esq.
Stephen E. Merrill, Esquire Office of the Executive Legal Director Attorney Ceneral U.S. Nuclear Regulatory Commission Coorge Dana Bisbee, Esquire Tenth Floor Assistant Attorney General Washington, DC 20555 Office of the Attorney General 25 Capitol Street Robert A. Bac;os. Esquire Concord, NH 03301-6397 116 Lowell street P.O. Box 516 Mr. J. P. Nadeau Manchester, NH 03105 selectmen's office 10 Central Road Philip Ahrens, Esquire Rye, NH 03870 I
Assistant Attorney GenerG1 Department of The Attorney General Mr. Angle Machiros statehouse station P6 Chairman of the Board of selectmen kugusta, NE 04333 Town of Newbury Newbury, MA 01950 Mrs sandra Cavutis Chairman, Board of 8electmen Mr. Willian 8. Lord i
RFD 1 - Box 1154 Board of selectmen Kennsington, NH 03827 Town Hall - Friend Street Amesbury, MA 01913 Carol S. Sneider Esquire Assistant Attorney General Senator Ccedon J. Humphrey Department of the Attorney General 1 Pillsbury Street One Ashburton Place, 19th Floor Concord, NH 03301 Boston, MA 02108 (ATTN: Herb Boynton)
Senator Gordon J. Humphrey H. Joseph Flynn, Esquire U.S. Senate Office of General Counsel Washington, DC 20510 Federal Emergency Management Agency g 500 C Street, SW (ATTN: Tom Burack) f Washin5 on, DC 20472 t
Richard A. !fampe Esq.
Hampe and McNicholms Paul McEachern Esquire 35 Pleasant street Matthew T. Brock, Esquire Concord, NH 03301 Shaines & McEachern 25 Maplewood Avenue Donald E. Chick P.O. Box 360 Town Manager Portsmouth, NH 03801 Town of Exeter 10 Front Street Cary W. Holmes, Esq.
Exeter, NH 03833 Holmes & Ells 47 Winnacunnet Road Brentwood Board of Selectmen Hampton, NH 03841 RFD Dalton Road Brentwood, NH 03833 Mr. Ed Thomas FEMA Regica I Peter J. Mathews, Mayor 4 A2 John W. McConnack PO & Courthouse City Hall Boston, MA 02'409 Newburyport, MA 01950 Stanley W. Knowles, Chairman Board of Selectmen P.O. Box 710 North Hampton, WH 03862
Administrative Judge Helen Hoyt, Chairperson Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Administrative Judge Sheldon J. Wolfe, Chairman Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Dr. Eameth A. Luebke Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Dr. Jerry Harbour Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D.C. 20555 i
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~S' SBN-1024 ATTACRMENT 1 J
E.Q. FILE POST ACCIDENT NUMBER NUMBER DESCRIPTION OPERATING TIME OF ITEMS 113-03-01 Okonite 600V 30 days 3
Power Cable 113-17-01' Anaconda 600V 30 days 11 Control Cable I -
113-18-01 Anaconda 300V 30 days 1
Instrument Cable 113-20-01 ITT Suprenant 300V 30 days 2
Instrument Cable 172-01-01 General Atomic Radiation 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 1
Monitors & Detectors (Outside Containment) i (Inside Containment) 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> 2
173-05-03 Mbisonellan E/P Converter 100 days 4
174-00-01 Foxboro Transmitters 100 days 13 4
248-36-01 Borg-Warner Feedwater 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> 4
Isolation Valves 252-38-01 ASCO Temperature Switches 30 days 4
600-01-04 Raychem 8KV Motor 100 days 13 Connector Kits 600-06-01 Namco EC 210 Series 318 days 16 Conduit Seals 4
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