ML20126B469
| ML20126B469 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 02/04/1980 |
| From: | Jay Collins NRC - NRC THREE MILE ISLAND TASK FORCE |
| To: | Arnold R METROPOLITAN EDISON CO. |
| Shared Package | |
| ML20126B468 | List: |
| References | |
| CON-NRC-TMI-80-020, CON-NRC-TMI-80-20 NUDOCS 8003130120 | |
| Download: ML20126B469 (5) | |
Text
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pS 4dw UNITED STATES f,
NUCLEAR REGULATORY CoMMisslON
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February 4,1980 HRC/THI-80-020 Docket No. 50-320 4
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Iir. R. C. Arnold Senior Vice President l,..
IE Metropolitan Edison Company gt.
S 100 Interpace Parkway t
Parsippany, New Jersey 07054
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Dear tir. Arnold:
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Subject:
Reactor Building Purge
Reference:
GPU letter, GQL 1416, R. C. Arnold to R. H. Vollmer, dated Novemoer 12, 1979 The NRC staff review of the hardware intended for use during the proposed purge of the Reactor Building (R.8,) has identified the following concerns:
1.
The purge discharge fan and filter housing do not appear to be compatible. The fan, AH-E34, is capable of producing a negative pressure in excess of 40 inches W.G. at the fan inlet during zero y
flow conditions.
The filter housing, which is connected to the fan inlet, is rated to a minimum pressure of -11 inches U.G.
This disparity in pressure ratings provides a potential for filter housing failure and a resultant radioactive release to the Auxiliary Building (A.B.).
Several situations can be identified which would result in underpressurization of the filter housing as a result of the pressure rating disparity.
These include:
a.
Automatic closure of valve AH-V3A on high R.B. pressure.
b.
Inadvertent closure of any one of the valves upstream of the filter housing.
c.
High pressure drop across the filters and/or high R.B.
negative pressure.
Please note that a R.B. pressure.of
.4 PSIG is in itself sufficient to exceed the filter.
housing negative pressure rating.
'2.
To ensure against inadvertent release of R.B. gases through the air inlet valve, AH-V7, controls should be established to maintain the R.B. at a negative pressure with respect to the A.B. throughout the purge. The automatic closure set point of AH-V3B should be reset from +.5 PSIG to some negative value.
The feasibility of adding a check valve type device to.the air inlet line should be ipvestigated.
sousi50 ro p
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Mr. R. C. Arnold 2
February 4,1980 3.
The filters are situated in a low point with respect to the other t.'
purge system components. Any' condensation would, therefore, collect in the filter housing. Filter housing drains directed to a liquid waste collecting system should be added to the design.
4.
Please provide additional information on the type of sensors and indicators which will be used to measure purge flow rates.
What is the accuracy of these devices at the projected purge rates?
The concerns addressed in this letter are hardwara oriented and as such do not affect the progress of the R.B. Purge Environmental Assessment, which is currently being prepared by the NRC staff. The release of the Environmental Assessment, however, will be contingent upon satisfactory resolution of all
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hardware and technical concerns.
p M
John T. Collins Deputy Director NRC/TMI Technical Support Staff cc: See Distribution List O
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Mr. R. C. Arnold 3
cu.c nr.T C 1A Metropolitan Edis,on Company Walter W. Cohen, Consumer Advocate Ms. Kathy McCaughin Department of Justice Three Mile Island Alert, Inc.
Strawberry Square,14th Floor 23 South 21st Street Harrisburg, PA 17.137 0)
Harrisburg, PA 17104 g
4 Robert L. Knupp, Esqu gs Ms. Marjorie M. Aamodt Assistant Solicitor h
T R. D. #5 Coatesville, PA 19320 Xnupp and Andrews
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-12 P. O. Box P Ms. Karen Sheldon
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407 H. Front Street Sheldon, Harmon, Roisman & Weiss Harrisburg, PA 17108 f
1725 I Street, N.W., Suite 506 John E. Minnich, Chairpe Washington, DC 20006
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Dauphin Co. Board of Commi'sif oner
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Dauphin County Courthouse Earl B. Hof fman Front and Market Streets Dauphin County Corrmissioner F
Harrisburg, PA 17101 Dauphin County Courthouse Front and Market Street Robert Q. Pollard Harrisburg, PA 17101 Chesapeak Energy Alliance 609 Montpelier Street Government Publications section F
Bal timore, MD 21218 State of Library of Pennsylvania Box 1601 Education Building Chauncey Xepford Harrisburg, PA 17127 Judith H. Johnsrud T
Environmental Coalition on Nuclear Power Dr. Edward O. Swartz 433 Orlando Avenue Board of Supervisors State College, PA 16801 Londonderry Township RF0 #1 Geyers Church Road Hs. ' Frieda Berryhill, Chairperson Middeltown, PA 17057
- l Coalition for Nuclear Power Plant ll Postponement U. S. Environmental Protection Agency 2610 Grendon Drive Region III Office 3i Wilmington, DE 19808 ATTN:
EIS COORDINATOR Curtis Building (Sixth Floor)
Holly S. Reck 6th and Walnut Streets Anti-Nuclear Group Rep' resenting York Philadelphia, PA 19106 245 W. Philadelphia Street York, PA 17404 Dauphin County Office Emergency Preparedness John Levin, Esquire Court House, Room 7 Pennsylvania Public Utilities Commission Front and Market Streets P. O. Box 3265 Harrisburg, PA 17101
. Harrisburg, PA 17120 Department of-Enviornmental Resources Jordon D. Cunni'ngham, Esquire ATIN:. Director, Office of Fox, Farr and Cunningham Radiological Health 2320 N. Second Street P. O. Sox 2063 Harrisbur,g, PA 17110 Harrisburg, PA 17105
.s R. C. Arnold 4
Metropolitan Edison Company Mr. R. F. Wilson George F. Trowbridge, Esquire Director, THI-2 Shaw, Pittman, Potts & Trowbridge
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Hetropolitan Edison Company 1800 M Street, N.W.
Washington, OC 20036 P. O. Box 480 Middletown, PA 17057 tis. Mary V. Southard, Chairperson Mr. J. J. Barton Citizens for a Safe' Environment Manager, site Operations, D4I-2 P. O. Box 405 Metropolitan Edison Company Harrisburg, PA 17108
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P. O. Box 480 Middletown, PA 17057 Dr. Walter H. Jordan 881 W. Outer Drive Mr. R. W. Heward Oak Ridge, TN 37830 Radiological Control Manager, TMI-2 j
Metropolitan Edison Company Dr. Linda W. Little P. O. Box 480 5000 Hermitage Drive e
Middletown, PA 17057 Raleigh, NC 27612
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! I Mr. B. Elam Xarin W. Carter, Esquire 1
Manager, Plant Engineering 505 Executive House Metropolitan Edison Company P. O. Box 2357 P. O. Box 480 Harrisburg, PA 17120 Middletown, PA 17057 Honorable Mark Cohen Mr. L. W. Harding 512 E-3 Main Capital Building
.i Supervisor of Licensing Harrisburg, PA 17120 "P
J Metropolitan Edison Company
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P. O. Box 480 Ellyn Weiss, Esquire Middletown, PA 17057 Sheldon, Harmon, Roisman & Weiss 1725 I Street, N.W., Suite 506 Mr. E. G. Wallace Washington, DC 20006 Licensin'g Manager
!l GPU Service Corporation Mr. Steven C. Sholly 100 Interpace Parkway 304 5. Market Street Parsippany, NJ 070S4 Mechanicsburg, PA 17055
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Mr. I. R. Finfrock, Jr.
Mr. Thomas Gerusky Jersey Central Power & Light Company Bureau of Radiation Protection Madison Avenue at Punch Bowl Road P. O. Box 2063 Morristown, NJ 07950 Harrisburg, PA 17120 Mr. R. W. Conrad Mr. Marvin I. Lewis Pennsylvania Electric ' Company 6504 Bradford Terrace 1007 3 road Street Philadelphia, PA 19149 Johnstown, PA.15907 Ms. Jane Lee J. B. Lieberman, Esquire R. 0. 3, Box 3521 Berlock.. !srael, Lieberman Etters, PA 17319 26 Erca hay new York, NY 10004,
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Mr. R. C. Arnold 5
Hetropolitan Edison Company I.:
Governor's Office of State Planning and Development p.
ATTN:. Coordinator, Pennsylvania Clearinghouse,
'P. O. Box 1323 1
Harrisburg, PA 17120 g:
Mrs. Rhoda D. Carr 1402 Marene Drive Harrisburg, PA 17109
.i Hr. Robert B. Borsum
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Babcock & Wilcox
- I Huclear Power Generation Division y-Suite 420, 7735 Old Georgetown Road Bethesda, MD 20014 Ivan W. Smith, Esquire
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Atomic Safety and Licensing Board i
U. S. Nuclear Regulatory Commission
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Washington, DC. 20555 Atomic Safety and Licensing Board Panel V. S. Nuclear Regulatory Commission Washington, DC 20555 Atomic Safety and Licensing Appeal Panel U. S. Nuclear Regulatory Commission Washington, DC 20555 Docketing and Service Section ji U. S. Nuclear Regulatory Commission Washington, DC 20555
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