ML20155K594
| ML20155K594 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 05/27/1986 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-3.D.1.1, TASK-TM SBN-1069, NUDOCS 8605290044 | |
| Download: ML20155K594 (5) | |
Text
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SEABROOK STATION Engineering Office
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May 27, 1986 Put$c Service of New Hampshire SBN-1069 T.F.
B7.1. 2 United States Nuclear Regulatory Commission Washington, DC 20555 Attention:
Mr. Vincent S. Noonan, Project Director PWR Project Directorate No. 5
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket No. 50-443 and 50-444 Subj ect :
Confirmatory Issue No. 41 - Systems Outside Containment Containing Radioactive Material - NUREG 0737, Item III.D.l.1
Dear Sir:
Enclosed herewith is the description of the surveillance program that responds to NUREG 0737, Item III.D.I.1, Integrity of Systems Out-side Containment Likely to Contain Radioactive Materials.
We t rust that the enclosed is acceptable and request that the reso-lution of the above referenced SER Confirmatory Issue be reflected in the next supplement to Seabrook's SER.
Very truly yours, J
John DeVincentis Director of Engineering Enclosure cc: Atomic Safety and Licensing Board Service List 8605290044 860527 PDR ADDCK 05000443 PDR g
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L Seabrook Station Construction Field Office. P.O. Box 700. Seabrook. NH O3874
s' Dicn3 Currcn, Esquire Calvin A. Ccnnsg Harmon & Weiss City Manager 2001 S. Street, N.W.
City Hall Suite 430 126 Daniel Stredt Portsmouth WH 03801 Washington, D.C.
20009 Sherwin E. Turk Esq.
Stephen E. Merrill, Esquire Office of the Executive Legal Director Attorney Ceneral U.S. Nuclear Regulatory Comunission George Dana Bisbee, Esquire Tenth Floor Assistant Attorney General Washington, DC 20555 Office of the Attorney General 25 Capitol Street Robert A. Backus. Esquire Concord, NH 03301-6397 116 towell Street P.O. Box 516 Mr. J. P. Nadeau Manchester, NH 03105 Selectmen's office 10 Central Road Philip Ahrens Esquire Rye, NH 03870 Assistant Attorney General Department of The Attorney General Mr. Angle Machiros Statehouse Station M Chairinan of the Board of Selectmen kugusta ME 04333 Town of Newbury Newbury, MA 01950 Mrs. Sandra Cavutis Chairman, Board of Selectmen Mr. William 8. Lord 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 Gordon 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 Wachington, DC 20510 Federal Smergency Management Agencyg (ATTW: Tom Burack) 500 C Street, SW Washinston, DC 20472 Richard A. Hampe. Esq.
Hampe and McNicholas Paul U:$achern, Esquire 35 Pleasant Street Matthew T. Bec,ck, Esquire Concord, NH 03301 Shsines & McEachern 25 Maplewood Avenue Donald E. Chick P.O. Box 360 Town Manager Portsmouth, NN 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 Jtegion I Peter J. Mathews, Mayor 442 John W. McCormack PO & Courthouse City Hall Boston, MA 02109 Newburyport, MA 01950 Stanley W. Knowles, Chairman Board of Selectmen P.O. Box 710 North Hampton, NH 03862
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o ATTACHMENT TO SBN-1069 INTEGRITY OF SYSTEMS OUTSIDE CONTAIMiENT LIKELY TO CONTAIN RADIOACTIVE MATERIAL Position NUREG 0737. Item III.D.1.1 Applicants shall implement a program to reduce leakage f rom systems outside con-tainment that would or could contain highly radioactive fluids during a serious transient or accident to as-low-as practical levels. This program shall include the following:
(1)
Immediate leak reduction (a)
Implement all practical leak reduction measures for all systems that could carry radioactive fluid outside of containment.
(b) Measure actual leakage rates with system in operation and report them to the NRC.
(2) Continuing Leak Reduction - Establish and implement a program of preventive maintenance to reduce leakage to as-low-as pratical levels. This program shall include periodic integrated leak tests at intervals not to exceed each refueling cycle.
Clarification Applicants shall provide a summary description, together with initial leak-test results, of their program to reduce leakage from systems outside containment that would or could contain primary coolant or other highly radioactive fluids or gases during or following a serious transient or accident.
(1) Systems that should be leak tested are as follows (any other plant system which has similar functions or postaccident characteristics even though not specified herein, should be included):
Residaa! hast ramotal (RHR)
Containment spray recirculation liigh pressure injection recirculation Containment and primary coolant sampling icactor core isolation cooling Makeup and letdown (PWRs only)
Waste gas (includes headers and cover gas system outside of containment in addition to decay or storage system)
Include a list of systems containing radioactive materials which are excluded f rom program and provide justification for exclusion.
r (2) Testing of gaseous systems should include helium leak detection or equiva-lent testing methods.
(3)
Should consider program to reduce leakage potential release paths due to design and operator deficiencies as discussed in our letter to all operating nuclear power plants regarding North Anna and related incidents, dated October 17, 1979.
Response
A leakage reduction surveillance program has been developed and baseline data is being taken as a part of the initial startup effort.
The surveillance program includes the follmaing systens:
Containment Spray Recirculation (CBS)
Chemical and Volume Control (ECCS portion) (CS)
Safety Injection (SI)
Primary Coolant Sampling (SS)
Sys tems that may contain radioactive fluids under post accident conditions that are not included in this surveillance are:
Hydrogen Recombiners (CGC)
Basis:
Seabrook's hydrogen recombiners are located inside the primary containment building.
Hydrogen Detection (CGC)
Basis: The hydrogen detectors and associated tubing are tested during the containment type A integrated leak rate test (ILRT) per 10 CFR 50 APPX J.
The containment isolation valies are locked closed during normal plant operation.
(Note: The valves are unlocked and opened for the ILRT).
Waste Gas (VG)
Basis: The vent gas headers in the containment are only used during infre-quent maintenance operations during refueling outages such as the fill and vent of the reactor coolant system. Use of the system involves containment entry to open normally closed manual valves.
This system is not required for post accident monitoring or for accident mitigation.
a The surveillance procedure contains data sheets which are used to document visual inspections of the piping outside containment for each system in the program. The visual inspections s're a " hand-over-hand" type walkdown while the system is in operation, (usually daring a pump functional test,l.
Types of potential leakage locations f uelude valve bolted joints, valve packing, heat exhanger flanges, pump shafts, etc.
The data sheets record work request numbers which are initiated when leakage is found.
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