ML19312D759
| ML19312D759 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/07/1980 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Arnold R METROPOLITAN EDISON CO. |
| References | |
| NUDOCS 8003250297 | |
| Download: ML19312D759 (5) | |
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NUCLEAR REGULATORY COMMISSION o
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WASHING TON, D. C. 20555
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March 7, 1980 Docket No. 50-289 Mr. R. C. Arnold Senior Vice President Metropolitan Edison Company 100 Interpace Parkway Parsippany, New Jersey 07054
Dear Mr. Arnold:
We have reviewed the results of your analyses concerning uneven drawdown of the sodium thiosulfate and sodium hydroxide banks of the Three Mile Island, Unit No.1 (TMI-1) containn:ent bui.1 ding spray system. As a result of our review and in light of recent tests at other facilities having similar spray additive systems as yours, reasonable assurance has not been provided that the proper solution concentration will be main-tained for removal of iodine (I 131) in the containment in the event of the design basis accident (DBA).
The lack of assurance is due to the utilization of sodium thiosulfate buffered with sodium hydroxide for which the solution concentration cannot be controlled within the narrow range of permissible concentration at the containment spray header during drawdown.
~ Therefore, we conclude that an extensive series of tests would be required to demonstrate that the present system is capable of performing its design function and that there is a considerable liklihood that the tests would not provide the required results. An alternative is to demonstrate that operation with sodium hydroxide alone is acceptable.
If this alternative is chosen, it should be shown to be acceptable using the guidance in Enclosure 1.
It is requested that you inform us within twenty (20) days of the receipt of this letter of your approach and schedule for resolving this issue. This matter should be resolved prior to restart of the reactor.
Sincerely,
,TertW.Reid, Chief Ro Operating Reactors Branch #4 Division of Operating Reactors
Enclosure:
Containment Spray Evaluation cc w/ enclosure:
See next page f
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A.
CONTAINMENT' SPRAY EVALUATION Assumption: - The reactor building spray system modified by deleting the sodium thiosulfate while retaining the sodium hydroxide.
a.=1 Assure adequate system configuration and concentration at the holdup. tanks so that the Ph of 8.5-to 11 exists at the spray nozzels and that the long-term sump solution (after mixing) will be above 8.0.
Also consider the drawdown capability of-4
.the system from the holdup-tanks to the spray nozzels in the containment building and a single worst case failure in this
- system, b.
determine the iodine removal effectiveness of the spray using the evaluation methods described in NUREG-CR-0009, demonstrate that offsite doses for the design basis accident c.
will be within the 10 CFR 100 guidelines based on the calculated iodine reduction.
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Metropolitan Edison Company Dr. Walter H. Jordar-SBl W. Outer Drive
' Oak AMge. Tennessee 37830 ccw/enclosura(s):
Mr. Marvin I. Lewis Dr. Linda W. Little 5000 Hermitage Drive ad p a enn Ivania 19149 Raleigh, North Carolina 27612 Walter W. Cohen, Cons mer Advocate Holly S. Ieck Department of Justice Strawberry Square,14th Floor Anti-Nuclear Group Representing York Harrisburg, Pennsylvania 17127 245 W. Philadelphia Street Robert L. Knupp, Esq.
York, Pennsylvania 17404 Assistant Solicitor Knupp and Andrews John Levin, Esq.
P.O. Box P Pennsylvania Public Utilities Comm.
Box 3265 407 N. Front Street Harrisburg, Pennsylvania 17120
' Harrisburg, Pennsylvania 17108 John E. Minnich, Chairman Jordan D. Cunningham, Esq.
Fox, Farr and Cunningham Dauphin Co. Board of Commissioners 2320 North 2nd Street Dauphin County Courthouse Front and Market Sts.
Harrisburg, Pennsylvania 17110 Harrisburg, Pennsylvania.17101 Theodore A.-Adler, Esq.
o Atomic Safety and Licensing Appeal Board WIDOFF REAGER SELK0WITZ & ADLER Post Office Box 1547 U.S. Nuclear Regula tory Commission Harrisburg, Pennsylvania 17105 Washington, D. C.
20555 0
Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Coatesville, Pennsylvania 19320 Washington, D. C.
20555 Ms. Karen Sheldon o Docketin'g and Service Section Sheldon, Harmon, Roisman & Weiss U.S. Nuclear Regulatory Commission 1725 1 Street, N. W.
Washington, D. C.
20555 Suite 506 Washington, D. C.
20006 Robert Q. Pollard Chesapeak Energy Alliance Earl B. Hoffman
'609 Montpelier Street Dauphin County Comissioner
-Baltimore, Maryland 21218 Dauphin County Courthouse Front and Market Streets Chauncey Kepford Harrisburg, Pennsylvania 17101 Judith H. Johnsrud Ellyn Weiss, Esq.
Environmental Coalition on Nuclear Power Sheldon Harmon, Roisman f. Weiss 433 Orlando Avenue I
State College, Pennsylvania 16801 he SO Washington, D.C.
20006 Ms. Frieda Berryhill, Chairrnan Coalition for Nuclear Power Plant Mr. Steven C. Sholly Postponement 304 South Narket Street 0610 Grendon Drive Mechanicsburg, Pennsylvania 17055 Wilmington, Delaware 19808 Mr. Thomas Gerusky Mrs. Rhoda D. Carr Bureau of Radiation Protection
-1402 Marene Drive Department of Environmentai Resources Harrisburg, Pennsylvania 17109 P.O. Box 2063 Harrisburg, Pennsylvania 17120
Metropolitan Edison Company.i Karin W., Carter, Esq.
505 Executive House Mr. G. P. Miller P. O. Box 2357 o
Mr. R. F. Wilson Harrisburg, Pennsylvania 17120 Mr. J. J. Barton Metropolitan Edison Company Nonorable Mark Cohen P. O. Box 480 512 E-3 Main Capital Building Middletown, Pennsylvania 17057 Harrisburg, Pennsylvania 17120 G. F. Trowbridge, Esquire Dauphin County Office Emergency Shaw, Pittman, Potts a Trowbridge -
Preparedness 1800 M Street, N.W.
Court House, Room 7 Washington, D. C.
20036 Front & Market Streets Harrisburg, Pennsylvania 17101 GPU Service Corporation Richard W. Heward, Project Manager Mr. E. G. Wallace Department of Environmental Resources Licensing Manager ATIN:
Director, Office of Radiological 100 Interpace Parkway Heal th Parsippany, New Jersey 07054 Post Of fice Box 2053 Harrisburg. Pennsylvania 17105 Pennsylvania Electric Company Mr. R. W. Conrad Director, Technical Assessment Vice President, Generation Division 1001 Broad Street Office of Radiation Programs Johnstown, Pennsylvania 15907 (AW-459)
U. S. Environmental Protection Agency Miss Mary V. Southard, Chairman Crystal Mall #2 Citizens for a Safe Environment Arlington, Virginia 20460 Post Of fice Box 405 Harrisburg, Pennsylvania 17108 Mr. Robert B. Borsum Babcock & Wilcox Governaent Publications Section Nuclear Power Generation Division State of Library of Pennsylvania Suite 420, 7735 Old Georgetown Road Box 1601 (Education Building)
Bethesda, Maryland 20014 Harrisburg Pennsylvania 17126
- Ivan W. Smith, Esq.
Mr. David D. Maxwell, Chairman Atomic Safety & Licensing Board Panel Board of Supervisors U.S. Nuclear Regulatory Conunission Londonderry Township Washington, D. C.
20555 RFD#1 - Geyers Church Road Middletown, Pennsylvania 17057 Ms. Kathy McCaughin Three Mile Island Alert, Inc.
U. S. Environmental Protection Agency 23 South 21st Street Region 111 Office Harrisburg, Pennsylvania 17104 ATTN:
EIS COORDINATOR Curtis Building (Sixth Floor) 6th and Walnut Streets Mr. L. W. Harding Philadelphia, Pennsylvania 19106 Supervisor of Licensing Metropolitan Edison Company Mr. J. G. Herbein P. O. Box 400 Vice President Middletown, Pennsylvania 17057 Metropolitan Edison Company P. 0. Box 480 Middletown, Pennsylvania 17057 Hs. Jane Lee R.D. 3; Box 3521 Etters, Fennsylvania 17319
Metropolitan Edison Company.
Mr. R. J. Toole Manager, TMI-l Metropolitan Edison Company Governor's Office of State Planning P. O. Box 480 and Development Middletown, PA 17057 ATTN:. Coordinator, Pennsylvania State Clearinghouse Mr. W. E. Potts P. O. Box 1323 Radiological Controls Manager, TMI-l Harrisburg, Pennsylvania 17120 Metropolitan Edison Company P. O. Box 480 Middletown, PA 17057 Mr. I. R. Finfrock, Jr.
Je.sey Central Power & Light Company Madison Avenue at Punch Bowl Road Morristown, New Jersey 07950 J.~B. Lieberman, Esq.
Berlock, Israel, Lieberman 26 Broadway New York, NY 10004 Mr. J. J. Colitz Plant Engineering Manager, TMI-1 Metropolitan Edison Company P. O. Box 480 Middletown, Pennsylvania 17057 9
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