ML19283B650
| ML19283B650 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 01/30/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7903050548 | |
| Download: ML19283B650 (4) | |
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UNITED STATES y"
~g NUCLEAR REGULATORY COMMISSION 3
1 j WASHINGTON D.C.20555
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~30,1979+ %
January
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Dockets Nos.: 50-317 and 50-318 Mr. A. E. Lundvall, Jr.
Vice President - Supply Baltimore Gas & Electric Company P. O. Box 1475 Baltimore, Maryland 21203
Dear Mr. Lundvall:
By letter dated September 11, 1978, you transmitted your Liquefied Natural Gas (LNG) Contingency Plan to be incorporated in the Site Emergency Plan Implementing Procedures for the Calvert Cliffs Nuclear Power Plant.
This LNG Contingency Plan was in response to our letter of June 13, 1978 and the Safety Evaluation transmitted therewith.
We have reviewed your LNG Contingency Plan against the topics and content previously discussed with your staff and find that additional information is necessary to complete our review. Please provide the infomation requested by the enclosure witnin 60 days of the date of this letter.
Sincerely, g.ka 'll- @ l Q
Robert W. Reid, Chief Operating Reactors Branch #4 Enclostea:
Division of Operating Reactors Calvert Cliffs LNG Contingency Plan Informatinn Requests cc w/ enclosure:
See next page 79030505N
j; Baltimore Gas & Electric Company CC*
James A. Biddison, Jr.
Mr, R. M. Douglass, Manager General Counsel
' Quality Assurance Department G and E Building Room 923 Gas & Electric Building Charles (enter P. O. Box 1475 Baltimore, Maryland 21203 Baltimore, Maryland 21203 George F. Trowbridge, Esquire Shaw, Pittnan, Potts and Trowbridoe 1800 M Street, N.W.
. Washington, D. C.
20036 Mr. R. C. L. Olson Baltimore Gas and Electric Company Room 922 - G and E Building Post Office Box 1475 Baltimore, Maryland 21203 Mr. Leon B. Russell, Chief Engineer Calvert Cliffs Nuclear Power Plant Baltinore Gas and Electric Comoany Lusby, tiaryland 20657 Bechtel Power Corporation ATTH: tir. J. C. Judd Chief Nuclear Engineer 15740 Shady Grove Road Gaithersburg, Maryland 20760 Combustion Engineering, Inc.
ATTN: Mr. P. W. Kruse, Manager Engineering Services Post Office Box 500 Windsor, Connecticut 06095 Calvert County Library Prince Frederick, Maryland 20678
o Enclosure Calvert Cliffs LNG Contingency Plan Information Requests Responses to the following infomation requests should be included in the LNG Contingency Plan and appendices thereto, or in an accompanying schedule for implenentation of the Plan.
1)
Please describe the status of the installation of a radio monitor in the CCNP Control Room that would automatically energize on an appropriate frequency should an emergency alarm be sounced at Cove Point.
2)
Please describe the status of your development of a practical system for providing remote detection of unignited LNG spills.
3)
Please describe provisions for preventing LNG vapor from entering diesel generator and battery rooms.
4)
If a complete loss of all on and off-site AC electrical power were to occur, describe the availability and capacity of backup portable AC power including location of such equipment, time to deliver and set up at CCNP and time to tie-in to plant electrical distribution system.
5)
Item #7 of the LNG Contingency Plan Procedures instructs personnel to wear emergency air breathing apparatus outside the plant when an LNG vapor cloud may be enveloping the plant. Please describe the rest of protection for such personnel, e.g., asbestos or reflective fireman's suits.
6)
Describe the criteria for restart of equipment which had not been oper-ating during envelopment by LNG vapor to assure that there is no residual pocket of flanrnable vapor.
. 7)
You propose, under Training, that drills of the LNG Contingency Plan need not be conductec more often than every five years. The procedure for an approaching cloud includes shutdown of equipnent, doors and ventilation systems, and time may be of the essence in accomplishing such tasks. It is our position that drills of the LNG Contingency Plan should be held more frequently - annually or at every refueling.
8)
Item #1 of the LNG Contingency Plan Procedure states that the location, the magnitude of the spill and the time of spill should be obtained Dy CCNP when a call is received about an LNG spill. The wind speed and direction at the location of the spill should also be obtained.
9)
The first section of the LNG Contingency Plan includes a description of the potential threat from the source to the cloud reaching Calvert Cliffs.
Please continue your description to include the extent of the hazard if the LNG vapor cloud succeeds in reaching vital areas of the plant such as control room, cable spreading area, diesel generator room, battery room, salt water pump area, auxiliary feed pump area - that is, any area of the plant necessary for safe shutdown to cold conditions.
Your description should cover the three situations - the vapor remaining a vapor, the vapor igniting, and the vapor exploding.
10)
Describe how long the cores can be cooled witnout AC power. Your des-cription of the potential hazard of LNG vapor completely engulfing the plant should include an evaluation and justification for the time you estimate.
D