ML19320C067
| ML19320C067 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/03/1980 |
| From: | Herbein J METROPOLITAN EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-12, NUDOCS 8007150721 | |
| Download: ML19320C067 (4) | |
Text
a Metropolitan Edison Company r
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Post Office Box 480 Q'
f gj Middletown, Pennsylvania 17057 717 9444041 Writer's oirect Dial Number
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July 3, 1980 TLL 315 Office of Inspection and Enforcement Attn:
B. H. Grier, Director Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406
Dear Sir:
Three Mile Island Nuclear Station, Unit I (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 IE Bulletin 80-12 We have reviewed the events which occurred at Davis-Besse, and have reviewed the hardware capability of TMI-I to prevent a Decay Heat Removal (DHR) loss Additionally, we have analyzed our procedures for adequacy of safe-event.
guarding against loss of redundancy and diversity of DHR capability and adequacy of responding to DHR loss events.
As a result of these reviews and analysis the following procedure changes have been initiated.
1)
Operating Procedure 1104-4.
" Decay Heat Removal System" will be modified to provide additional administrative control over the position of DH-V6A/B (Reactor Building Sump Isolation Vavles). During i
cold shutdown and refueling shutdown conditions DH-V6A/B (except during testing will be tagged closed with their breakers open to prevent inadvertent opening and potential draining of the Borated Water Storage Tank to the Reactor Building sump.
- 2) Maintenance Procedure.1401-4.4.
" Removal and Replacement of Manway and Inspection Covers of the Once Through Steam Generator" will be modified to include the need to evaluate the DHR capabilities of other plang systems prior to removing any manways or inspection covers (on the primary or secondary side) from the OTSG's.
This evaluation will consider the value of decay heat generation in the core, the Reactor Coolant System heatup rate if DHR is lost, redundancy requirements of the DHR trains, and alternate DHR schemes should the DHR Systems become inoperable.
These procedures will be modified by July 31, 1980.
The daily logs, weekly and monthly surveillances monitor the performance capabilities of the DHR systems. Discrepancies detected by these surveillances 79 ec>/
/O 80 'ftr
$n Edd6n Company is a Member c' the General Pubhc Utatss System
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D/T TMI-I HCC f.TST Mrs. Pat Higgins Mr. S. H. Duerson Edison Electric Institute Habcock 5 Wilcox 1111 19th Strcot, NW P.O. Box 1260 Washington, D.C.
20555 I.ynchburg, VA 24505 Mr. E. L. 111ake, Jr.
Mr. T. F. Hartley, Jr.
Shaw, Pittman, Potts & Trowbridge Marsh & McLennan, Inc.
1800 "M" Street, NW 1221 Avenue of the Americas Washington, D.C.
20555 New York, NY 10020 Mr. R. Sancore Ms. Margaret Reilly American Nuclear Insurcrs Chief Div. of Reactor Review The Exchanne - Suite 245 PA I)cpartment of Environmental Resources 270 Farmington Avenue Fulton Bank Building Farmington, CT 06032 Harrisburg, PA 17120 B. A. Hockley - Discovery Room Crawford Stati S. D Chaplin - TMI Licensing R. J. Toole - TMI-I Supervisor C. J. Tror fer - TMI Trlr. 198 R. F. Wilson - T11I Tr1r. 105 C. K. Hovey - D11 Trlr. 105 W. N. Moreau - Met-Ed Reading P. Clark - CPUSC Parsippany C. W. Smyth - Parsippany Licensing R. Fenti - Ull - QA Tr1r. 22 E. G. Wallace - Parsippany Licensing it..l. Ross - TML - Ops. #1 W. E. Potts - TMI - Radiation Control - 1 L. W.
Harding - TMI Licensing A. Bell
- TMI GORB Secretary - Parsip.
R. M. Klingaman - Met-Ed Reading
F. Wilson - Dil Trlr. 14 C. A. Kunder - TMI-II PORC Chairman - Trl. 1 J. J. Colitz - TMI-I W. F. Schmauss - TMI-I GRC Chairman - Parsir 15. Ballard - D11 Trlr. 16 J. Thiesing - Bechtel Room #201 Admin Bldg.
C.
P. Miller - UtI-I P. S. Walsh - CPU Parsippany R.
C. Arnold - UtI - Tr1r. 201 D. Smith - Reading - Production Supervision D. C. Mitchell - Met-Ed Reading
.l. T. Collins - NRC Trlr. #1
[ M, c[ -[/h e n to
/Ydndgef R. A. Lengel - Engineers fl 7);, foSS ~
File:
02.0016.0001.0001.02
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B.,H. Grisr TLL 315 are corrected by means of the Corrective Maintenance Program. This combination is adequate to guard against DHR degradation and assess the DHR adequacy.
Sincerely, Signed J. G. Herbein J. G. Herbein Vice President TMI-I JGH:DGM:1ma Attachment cc: ' Director Division of Operations Inspection NRC Office of Inspection and Enforcement Washington, D.C.
20555 J. T. Collins B. J. Snyder H. Silver R. W. Reid D. Dilanni 4
9
1 "Attachmtat 1 TLL 315 METROPOLITAN EDISON COMPANY JERSEY tENTRAL POWER AND LIGHT COMPANY t
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PENNSYLVANIA ELECTRIC COMPANY THREE MILE ISLAND NUCLEAR STATION, UNIT I Operating License No. DPR-50 Docket No. 50-289 This letter is submitted in support of the Nuclear Regulatory Commission request concerning the May 7, 1980 letter transmitting IE Bulletin 80-12.
The responses to items 7a and b of the subject letter are attached. Further, all statements 1
contained in these responses have been reviewed and all such statements made and matters set forth therein are true and correct to the best of my knowledge, information and belief.
By
/s/ J. G. Herbein Vice President m
Sworn and subscribed-to me this 1 day of
- t. -f,t'<[
, 1980.
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UL. <D.' Nhsus hniic Lcn c.a.e,ry Ives., Dauphirt County. Ps. '
i My Comnessen Empicts Oct. 24,1,943
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