ML20069C358
| ML20069C358 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 03/30/1982 |
| From: | Murphy D Battelle Memorial Institute, PACIFIC NORTHWEST NATION |
| To: | Holman L Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20069C362 | List: |
| References | |
| CON-FIN-B-2323, TASK-3.D.3.4, TASK-TM NUDOCS 8204090298 | |
| Download: ML20069C358 (2) | |
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OBatteIIe Pacific Northwest Laboratories P.O. Box 999 Richland, Washington U.S.A. 99352 March 30, 1982 376-5417 Telex 15-2874 L. G. Hulman, Chief G
4 Accident Evaluation Branch Division of Systems Integration
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Office of Nuclecr Reactor Regulation RECElVED.
U.S. Nuclear Regulatory Commission g7 Apgg 7ggg 72 Washington, D.C.
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cum neaxm,
Dear Mr. Hulman:
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J FIN NO. B2323 C)
P TMI ACTION PLAN:
III.D.3.4 CONTROL ROOM HABITABILITY EVALUATION CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1 & 2 BALTIM0RE GAS & ELECTRIC DOCKET N0. 50-317/318 Based upon PNL review of the information submitted by the licensee in response to NUREG-0660, NUREG-0737, hnd other NRC Guidance, the control room meets the requirements of SRP 2.2.1 - 2.2.2, 2.2.3, and 6.4; and, therefore, meets the requirements of General Design Criteria (GDC) 4, 5, and 19.
The conclusions are based on the present plant system, imple-mentation of modifications addressed by the licensee, and incorporation of the recommendations of this evaluation.
The licensee calculated radiation doses to the control room operators are within GDC 19 guidelines.
In the December 30, 1980 submittal, the licensee stated that to ensure the external exposures are maintained below GDC-19 guidelines, "A new shield wall is being aoded (following a
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shielding analysis per NUREG-0578) to prevent any streaming through the pipe chase into the control room from below." The assumptions used y
I for calculating the radiation dose from airborne radioactivity identified 19 cfm of unfiltered air inleakage. The licensee does not test the leakage into the control room. Therefore, a more conservative infiltra-tion leak rate should be used in determining the doses during the recirculation mode. Additionally, the licensee needs to ensure that.
redundant dampers are placed in the air intake and exhaust ductworks l
which have direct access to the atmosphere.
The toxic chemical and gas analysis performed for the licensee indicated that the Calvert Cliffs plant would be habitable in the event of an accidental release of the hazardous and toxic gases and chemicals identified. Although this submittal indicates that no hazard exists, the l
licensee should consider placing sufficient self-contained breathing apparati j
(SCBA) in the control room to satisfy the intent of Reg. Guide 1.78.
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'. G. Hulman L
gg March 30,1982
.,BaHelle Page 2 Based on this submittal, implementation of the licensee's modifications, and incorporation of the above recommendations, we conclude that the control room habitability systems will provide safe, habitable conditions within the control room under both normal and accident conditions, including loss-of-coolant accidents, and that occupancy can be maintained under accident conditions. Therefore, the program meets the criteria identified in Item No. III.D.3.4, " Control Room Habitability" of NUREG-0737 and is, therefore, acceptable.
Respectfully submitted,
]O b U /D 3( W. Murphy, Ph.D.
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Senior Research Scientist Dosimetry Technology Section DWM/jkr cc:
H.E.P. Krug, NRC T.R. Quay, NRC l
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