ML19210E777
| ML19210E777 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 12/05/1979 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0578, RTR-NUREG-578 NUDOCS 7912120274 | |
| Download: ML19210E777 (3) | |
Text
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BALTI M O RE GAS AN D E LECTRIC CO M PANY GAS AND ELECTRIC BUILDING BALTIMORE, MARYLAN D 21203 ARTHUR E. LUN DVALL,JR.
v.c. p......,
Suwtv Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Attn: Mr. Darrel G. Eisenhut, Acting Director Division of Operating Reactors
Subject:
Calvert Cliffs Nuclear To.rer Plant Units Nos. 1 & 2, Dockets Nos. 50-317 & 50-318 Follow-up Actions Resulting from 'IMI-2 Incident (Lessons Learned Short Tern)
Gentlemen:
In recent phone conversations with your staff, we agreed to clarify and/or modify some of our previous responses to Short Term Lessons Learned reouirements, submitted to you by our letter of 11/20/79 These updates are as follows:
2.1.1 Faergency Power Sunnly Reauirements The third paragraph of our response should read as follows:
"The motive components of the nover operated relief valves (PORV's) are supplied from safety related h80 V motor control centers which have a diesel backup. The control connonents of the PORV's are supnlied from safety related 125 VDC battery buses. The motive and control connonents of the PORV block valves are supplied from safety related h80 V rotor control centers which have a diesel backup. In each case the motive and control power for the block valve is suuplied from a power supply train different from that which supplies the associated PORV."
2.1.3a Direct Valve Position Indication Delivery is expected to be improved substantially on this equip-ment, to at latest February. Some installation vill be done prior to receipt of equipment.
2.1.3b Subeccled Marcin Monitor Transmitters for temperature and nressure signals are critical path, with delivery anproximately six (6) weeks from order.
Installation could feasibly start by late February or early March.
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2.1.h Diverse Containment Isolation We are proceeding with the necessary modifications to the ESFAS reset circuits so that the resetting of containment isolation vill not allow these containment isolation valves to reopen until the operator individually opens each valve. Final design, and delivery of handsvitches and relays are critical path.
Installation could feasibly start in mid-February.
2.1.6a Interrity of Systems Containing Radioactivity As required by your letter of 10/17/79, we vill include a review by 1/1/80 of our systems and procedures for trocessing radioactive material with regard to the North Anna Unit 1 incident and similar release paths.
The reviev vill identify any modifications deemed necessary and schedule completion of modifications, if any.
2.1.8a 7muroved Post-Accident Samuline Canability All three places where " January, 1980" is mentioned should read "l/1/80".
"An outline of resulting procedures", mentioned in each of the first two paragraphs, should read "resulting procedures".
2.1.8b Increased Rance of Radiation Monitors
" January,1980" in the second paragraph should read "1/1/80".
2.1.8e Improved In-Plant Iodine Instrumentation We are procuring a new multi-channel analyzer which vill be designated to be used only for air samples for respiratory protection.
This vill be available by 1/1/80. It vill be located in the radiation control labs and vill be used for processing samples from normally occupied areas located nearby, including the Control Room and Technical Support Center. Samples from more remote areas vill be processed using single channel analyzers already on hand 2.1 9 Containment Hydrogen Indication We vill install the O to 105 hydrogen indication by 1/1/81.
2.2.2b Technical Sunnort Center Plans for staffing of the TSC vill be complete by 1/1/80.
NRC's plans for arranging for the extension of the NRC/ Control Room phone vill be carried out; installation date of this phone is dependent on the phone company.
The three items requiring outages listed in our 11/20 letter remain the most critical for us (2.1 3a, 2.1.3b, 2.1.h).
We are optimistic that we vill have some success in improving these deliveries, and based on 1534 243
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latest information are now nlanning to install these items in both units in the spring of 1080. This vill involve a two to four week outace for each unit sequentially. The first unit vill shut down roughly at the tine when all three of these critical jobs are ready for installation (ve presently foresee this to occur sometime around March); the second unit will shut down following return to power of the first unit. We vill con-tinue to evaluate our outage plans for installation baspel n new infornation as it becomes available, and vill keep you informed of
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- ficant changes.
Very truly yo s,
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cc:
J. A. Biddison, Esquire G. F. Trowbridge, Esquire Mr. E. L. Conner, Jr.
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