ML19323B512

Discusses Concerns Re Util Recommendation to Reduce RCS Temp to Below 120 F W/Reactor Bldg Temp Maintained Above 80 F & Have No Letdown,As Precaution to Prevent Mini Decay Heat Removal Sys Overpressurization from Steam Generator Burps

ML19323B512
Person / Time
Site:	Crane
Issue date:	04/16/1980
From:	Jay Collins Office of Nuclear Reactor Regulation
To:	Arnold R METROPOLITAN EDISON CO.
References
CON-NRC-TMI-80-064, CON-NRC-TMI-80-64 NUDOCS 8005120499
Download: ML19323B512 (5)

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i April 16,1980 NRC/THI-80-064 Docket No. 50-320 Mr. R. C. Arnold Senior Vice President Metropolitan Edison Company 100 Interpace Parkway Parsippany, New Jersey 07054

Subject:

Mini Decay Heat Removal Overpressurization from Steam Generator Burp We have reviewed the two letters, TMI-II-R-1219 dated January 9,1980, and THI-II-R-1194 dated December 17, 1979, concerning precautions to be taken in preventing the HDHR system from overpressurization due to steam generator " burps".

In the latter letter, three options were recommended.

They are:

(1) maintain letdown at 1.8 gpm when RCS temperature is above 1500F; (2) introduce a gas volume of 38.0 cu. ft. at 80 psi and have no letdown; and (3) reduce Reactor Coolant System (RCS) temperature to below 0

1200F with the reactor building temperature (RB) maintained above 80 F and have no letdown.

It appears that you reconinend to implement option (3).

We concur, however, we believe that a further study should be performed in order to detennine the best way of achieving and maintaining the RCS and RB temperature conditions prior to the NDHR system operation.

Some of our concerns are addressed in the following questions:

a.

" hat assurance is there in maintaining the RB temperature above 0

800F? The RB temperature has ranged from 75 F to 80 F with one pump running, but without the evaporation cooler functioning (our understanding).

With RB pump shut off can the temperature climb to higher than 800F or do fans also have to be shutdown? Secondly, how will the RCS temperature be reduced to and maintained at 1200F?

b.

For option 3, it is stated that letdown will have to be. aintained m

0 while using the 11DHR until the primary system is below 120 F.

This will create some waste via the letdown line.

We request that jou provide information concerning the activation of the OTS'. "B" loop icnc-term ccoling system for RCS temperature reduction down to d

12G F, and then activation of the MDHR system.

A.

Mr. R. C. Arnold 2

April 16,1980 In conclusion, we request that the above concerns be evaluated and the results bs reflected in the MDHR system operating procedure so as to include appropriate precautions in precluding MDHR overpressurization from steam generator burps.

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John T. Collins Deputy program Manager TMI program Office cc:

See Distribution List t

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Metropolitan Edison Company Mr. G. K. Hovey J. 8. Lieberman, Esquire Director, TMI-2 Berlock, Israel, Lieberman Metropolitan Edison Company 26 Broadway P. O. Box 480 New York, NY 10004 Middletown, PA 17057 George F. Trowbridge, Esquire Mr. J. J. Barton Shaw, Pittman, Potts & Trowbridge Manager, Site Operations, TMI-2 1800 M Street, N.W.

Metropolitan Edison Company Washington, DC 20036 P. O. Box 480 Middletown, PA 17057 Ms. Mary V. Southard, Chairperson Citizens for a Safe Environment Mr.' R. W. Heward P. O. Box 405 Radiological Control Manager, TMI-2 Harrisburg, PA 17108 Metropolitan Edison Company P. O. Box 480 Dr. Walter H. Jordan Middletown, PA 17057 881 W. Outer Drive Oak Ridge, TN 37830 Mr. B. Elam Manager, Plant Engineering Dr. Linda W. Little Metropolitan Edison Company 5000 Hermitage Drive P. O. Box 480 Raleigh, NC 27612 Middletown, PA 17057 Karin W. Carter, Esquire Mr. R. F. Wilson 505 Executive House Director, Technical Functions P. O. Box 2357 Metropolitan Edison Company Harrisburg, PA 17120 P.O. Box 480 Middletown, PA 17057 Honorable tiark Cohen 512 E-3 Main Capital Building Mr. L. W. Harding Harrisburg, PA 17120 Supervisor of Licensing Metropolitan Edison Company Ellyn Weiss, Esquire P. O. Box 480 Sheldon, Harmon, Roisman & Weiss E

'a ac Licensing Manager Mr. Steven C. Sholly GPU Service Corporation

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arket Straet 100 Interpace Parkway Mechanicsburo, PA Parsippany, NJ 07054 17055 Mr. Thcmas Gerusky "r.

I. R. Finfrock, Jr.

2areau of c.adiation Protection Jersey Central Power & Light Company P. O. Box 2063 v dison Avenue at Punch Bowl : cad Harrisburg, PA 17120 a

• rristo.,n, NJ 07950 Mr. Marvin I. Lewis Mr. R. W. Conrad 6504 Bradford Terrace Fensylvania Electric Company Philadelphia, PA 19149

-1007 3 road Street Johnstown, PA 15907 Ms. Jane Lee R. D. 3, Box 3521 Etters, PA 17319 6

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7 Mr. R. C. Arnold 4

t'etroFolitan Edison Company Wal te'r W. Cohen. Consumer Advocate Ms. Kathy McCaughin Department of Justice Three Mile Island Alert, Inc.

i Strawberry Square,14th Floor 23 South 21st Street Harrisburg, PA 17127 Harrisburg, PA 17104 Robert L. Knupp, Esquire Ms. Marjorie H. Aamodt Assistant Solicitor R. D. #5 Knupp and Andrews Coatesville, PA 19320 t

P. O. Box P 407 ff. Front Street f!s. Karen Sheldon Harrisburg, PA 17108 Sheldon, Harmon', Roisman & Weiss 1725 I Street, fl.W., Suite 506 John E. Minnich, Chairperson Washington, DC 20006 Dauphin Co. Board of Commissioners Dauphin County Courthouse Earl B. Hoffman Front and Market Streets Dauphin County Commissioner Harrisburg, PA 17101 Dauphin County Courthouse Front and !:arket Street Robert Q. Pollard Harrisburg, PA 17101 Chesapeak Energy Alliance 609 Montpelier Street Government Publications Section Baltimore, MD 21218 State of Library of Pennsylvania Box 1601 Education Building Chauncey Kepford Harrisburg, PA 17127 Judith H. Johnsrud Environmental Coalition on t!uclear Power Dr. Edward O. Swartz 433 Orlando Avenue Board of Supervisors State College, PA 16801 Londonderry Township RFD #1 Geyers Church Road Ms. Frien Serryhill, Chairperson Middletown, PA 17057 Coalitio. for ?!uclear Power Plant Postponement U. S. Environmental Protection Agency 2610 Grendon Drive Region III Office Uilmington, DE 19808 ATTN:

EIS C00RDIt!ATOR Curtis Suilding (Sixth Floor)

Holly S. Keck 6th and Walnut Streets Anti-Nuclear Group Representing, York Philadelphia, PA 19106

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245 W. Philadelphia Street York, PA 17404 Cauphin County Office Emergency Preparedness John Levin, Esquire Court House, Room 7 Pennsylvania Public Utilities Cor:aission Front and Market Streets P. O. Eox 3265 Harrisburg, PA 17101 Harrisburg, PA 17120 Department of Enviornmental Rescurces Jordon D. Cunningham, Esquire ATIN:

Director, Office of Fox, Farr and Cunningham Radiological Health 2320 tl..Second Street P. O. Box 2053 Harrisburg, PA 17110 Harrisburg, PA 1710S m-g-

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Metropolitan Edison Company Governor's Office of State, Planning and Development ATTN: Coordinator, Pennsylvania Clearinghouse P. O. Box 1323 Harrisburg, PA 17120 Mrs. Rhoda D. Carr 1402 Marene Drive Harrisburg, PA 17109 Mr. Richard Roberts The Patriot 812 Market Street Harrisburg, PA 17105 Mr. Robert B. Borsum Babcock a Wilcox Huclear Pcwer Generation Division Suite,420, 7735 Old Georgetown Road Bethesda, MD 20014 Ivan W. Smith, Esquire Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, DC 20555 Atomic Safety and Licensing Board Panel U. 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 O. S. Nuclear Regulatory Commission Washington, DC 20555 l

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