ML20042A979
| ML20042A979 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 03/12/1982 |
| From: | Vassallo D Office of Nuclear Reactor Regulation |
| To: | Rich Smith VERMONT YANKEE NUCLEAR POWER CORP. |
| References | |
| NUDOCS 8203240353 | |
| Download: ML20042A979 (6) | |
Text
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R MAR 121982 Docket No. 50-271 m
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Mr. Robert L. Smith Licensing Engineer MARI ~91982> C
'l Vermont Yankee Nuclear Power 9-satsa m mung }/
Corporation m an ammera -
g 1671 Worcester Road g
Framingham, Massachusetts 01701
Dear Mr. Smith:
Re: Vermont Yankee Nuclear Power Station We have determined that we need certain additional information to complete our review of your proposed Inservice Inspection Program as submitted October 23, 1979 and as modified by your submittals of October 10,1980 and December 28, 1981. Please provide answers to the enclosed questions within thirty days of receipt of this letter.
The request for information contained in this letter is specific to the Vermont Yankee Nuclear Power Corporation; therefore, OMB clearance is not required under P.L.96-511.
Sincerely, ORIGIt AL SIGED BY Domenic B. Vassallo, Chief Operating Reactors Branch #2 Division of Licensing cc: See next page DISTRIBUTION:
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Mr. Robert L. Smith cc:
Mr. W. F. Conway Public Service Board President & Chief Operating Officer State of Vermont Vermont Yankee Nuclear Power Corp.
120 State Street 411 Western Avenue Montpelier, Vermont 05602 Drawer 2 W;st Brattleboro, Vermont 05301 W. P. Murphy, Plant Superintendent Vermont Yankee Nuclear Power Corp.
Mr. Louis H. Heider, V.P.
P.O. Box 157 Vermont Yankee Nuclear Power Corpo.
Vernon, Vermont 05354 25 Research Drive Westboro, Massachusetts 01581 Vermont Yankee Decomissioning Alliance John A. Ritscher, Esquire 5 State Street Rope s Gray Box 1117 226 Frankline Street Montpelier, Vennont 05602 Boston, Massachusetts 02110 Brooks Memorial Library Honorable John J. Easton 224 Main Street Attorney General Brattleboro, Vermont 05301 State of Vermont 109 State Street Resident Inspector Montpelier, Vermont 05602 c/o. U.S. NRC P.O. Box 176 Vermont Yankee Decommissioning Vernon, Vermont 05453 Alliance 53 Frost Street Ronald C. Haynes Brattleboro, Vermont 05301 Regional Administrator, Region I U.S. Nuclear Regulatory Commission Mr. E. W. Jackson 631 Park Avenue Manager of Operations King of Prussia, PA 19406 Vermont Yankee Nuclear Power Corp.
411 Western Avenue Drawer 2 West Brattleboro, Vermont 05301 Raymond N. McCandless Vermont Division of Occupational
& Radiological Health Administration Building 10 Baldwin Street l
Montpelier, Vermont 05602 I
New England Coalition on Nuclear Pollution Hill and Dale Farm l
R.D. 2, Box 223
(
Putney, Vermont 05346 l
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REQUEST IOR ADDITIONAL Ifif0Rt1AT10tl lil5LRVICE INSPECTION PROGRAM Vermont Yankee I.
Class __1 Components
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1.
Requests for Relief B-1, B-2 (pg 1-118 Ref.1) (B-A, B-B)
These relief requests concern volumetric examinations of the longitudinal and circumferential shell welds in the core beltline region (B-A) and the cir-cumferential and meridional seam welds on the bottom head (B-B).
The welds are inaccessible due to bio-shield configurations and/or interference by vessel insulation. The following additional information is requested:
(a) Is it possible to perform surface or remote visual examination on these welds to supplement volumetric examination? Please provide an estimate of the percentage of each weld which may be accessible to supplementary examination.
2.
Requests for Relief B-5, B-6 (pg I-120, Ref.1)(B-M-2, B-L-2)
Relief is requested from visual examination of the inter-al pressure boun-dary surfaces of various valve bodies and pump casings.
Disassembling a valve or pump for the sole purpose of performing a visual inspection is said to impose an undue burden on the plant and may increase the probability of component failure. The following additional information is requested:
(a) Please provide an estimate of the man-hours that would be expended and the radiation exposures that would be incurred through performing an examination on each of the required components.
(b) Please give an estimate on how often a pump or a valve that would satisfy the code requirements ran be expected to be disassembled for maintenance.
II.
Pressure Testing 1.
Request for Relief H-4 (pg H-16, Ref.1) (Reactor Cleanup Water System Hydro)
This request for relief concerns a portion of the reactor cleanup water system piping, CUW-55 between valves V10-63 and V10-62. This piping section l
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cannot be isolated from the Safety Class 3 line CUW-54.
Testing this section to 1.25 times design pressure would overpressure line CUW-54.
The following additional infonnation is requested:
(a) Your drawing, P-2 of Ref.1, is called out as the reference drawing for this request for relief.
While line CUW-55 is shown on this drawing, the valves that are shown in this line are valves V12-62 and V12-63. No piping is shown upstream from valve V12-62. Also, line CUW-54 is not shown on this drawing.
Please submit a marked-up copy of drawing P-2 showing line CUW-54, as well as the line between the two valves in question with the proper valve numbers.
Please indicate the boundary between the two lines of different design pressure.
2.
Request for Relief _H-5 (pg H-17, Ref.1) (RHR Pump Discharge Line Hydro-static Test)
Relief is requested to exclude the RHR pump discharge lines from pressure testing at the higher RHR system test pressure because the discharge lines are not isolable from the lower-test-pressure suction lines immediately upstream from the pumps.
The following additional information is requested:
(a) Is there a flange at the suction of each pump which could be blanked off to isolate the suction piping from the pumps?
(b) Please provide enough information on piping and valve specifications for these suction lines to allow a determination of the pressure at which the linking component can be tested.
3.
Request for Relief H-8 (pg H-18. Ref.1) (Fuel Pool Cooling and Cleanup Line,FPC-34)
This request for relief concerns the hydrostatic testing of line FPC-34 which cross-connects the condensate transfer system with the fuel pool ' cleaning and cleanup system.
This line is not isolable from the condensate transfer system, and therefore, performing a hydrostatic test on this line would require extensive tie-up of the condensate transfer system.
This system is required to provide emergency makeup to the spent fuel pool as well as various other functions during all modes of operation. The following additional information is requested:
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(a) Drawing T-3 (pg H-10. Ref.1) shows that while line FpC-34 is un-isolable from the condensate transfer system, it is apparently isolable from the fuel pool cooling system.
Should this line be included in the ISI pressure testing program for the condensate transfer system?
Request for Relief H-9 (pg H-19, Ref.1) (Service Water System) 4.
This request for relief applies to the ISI pressure testing of the entire service water system.
This system removes heat from various components during both power oper'ation and plant shutdown.
The system runs "approximately 100".
of the time" (Ref.1).
The following audii.;Gn::1 information is requested:
(a) Can the service water system be pressure-tested during times when the plant has been shut down long enough so that the service water system can safely be taken out of service?
5.
Request for Relief H-10 (pg H-19, Ref.1) (Diesel Start System)
The diesel air-start system provides high-pressure air to diesel gene -
ators to turn the engines over for starting. This request seeks relief from the requirement to perfonn a hydrostatic test on the diesel air-start system.
The basis for relief is that the introduction of water may be detrimental to the diesels and system operation.
The following additional information is requested:
(a) Table H-1 (pg H-7, Ref. 1) states that the diesel air-start system design pressure is 260 psig and that its test pressure is 250 psig.
The relief request basis states that the system's normal operating pressure is 250 psi. Please explain why this system normally operates at its required test pressure.
(b) Systems such as this are required to have provision for draining water which accumulates during normal operation.
Please provide more Justi-fication for your inability to blow this system.down properly after a hydro.
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6.
Reques_t, for Relief 11-13 (pg 11-21 Ref.1) (Dry Well Sum;) Pump Discharge Lines)
Relief is requested for hydrostatically testing the dry well sump pumps' discharge lines.
The safety function of this piping is to contain the dry well atmosphere; therefore, hydrostatic testing is said to be inappropriate.
The following additional information is requested:
(a) Please supply a P&lD for this system. What are the normal operating pressures in the discharge line when these pumps are running?
7.
Request for Relief H-18 (pg H-23, Ref.1) (CRDM Hydraulic Operating Lines)
Relief is requested from the requirement to hydrostatically test the CRDM hydraulic operating lines.
Isolation of these lines,for hydrostatic testing is considered impractical due to the large number of valves to be realigned and could represent a potential safety hazard if any of these valves are in-advertently left in the test position. The following additional information is requested:
(a) Please provide additional justification, such as potential for high man-rem exposure, for this request.
REFERENCE:
1.
R. H. Groce, VYNPC to T. A. Ippolito, NRC, ISI Program Description, Rev. 2, as transmitted by WVY-79-122, October 23, 1979, and as updated by the following ISI Revisions:
Rev. 5 - 10/10/80, and Rev. 6 - 12/28/81 (FVY-81-177).
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