Gaining control room habitability margin at the Palisades Plant

Conference · Fri Jan 01 04:00:00 EST 1993 · Transactions of the American Nuclear Society; (United States)

OSTI ID:6960042

Harden, P A ^[1]

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1. Consumers Power Co., Covert, MI (United States)

The bounding design-basis accident for control room habitability is the loss-of-coolant accident (LOCA). At Palisades, very little margin existed between the calculated control room operator thyroid dose and the 0.3-Sv (30-rem) limit of Standard Review Plan (SRP) 6.4. Also, a low rate of unfiltered air leakage into the control room during the emergency mode of operation, 5.5 x 10[sup [minus]3] m[sup 3]/s (11.6 ft[sup 3]/min), was accounted for in the control room habitability analysis. The control room heating, ventilating and air-conditioning system at Palisades has louvered isolation dampers for the normal air intake that are exposed to a negative pressure. Considering the small margin to the thyroid dose limits and the leakage characteristics of louvered dampers, a low allowable rate of unfiltered air in-leakage raised some concern. A significant effort has been initiated to alleviate control room habitability concerns at Palisades. The first step in this effort was to evaluate the calculational models for control room habitability and gain margin through updated analytical methods. To accomplish this, a new radiological consequence analysis for the LOCA was completed.

• OSTI ID: 6960042
• Report Number(s): CONF-931160--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 69
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210100* -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
ACCIDENTS
ANIMALS
BODY
CONTROL ROOMS
DESIGN BASIS ACCIDENTS
DOSE LIMITS
DOSE RATES
ENDOCRINE GLANDS
ENRICHED URANIUM REACTORS
GLANDS
LOSS OF COOLANT
MAMMALS
MAN
ORGANS
PALISADES-1 REACTOR
PERSONNEL
POWER REACTORS
PRIMATES
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTOR OPERATORS
REACTOR SAFETY
REACTORS
SAFETY
SAFETY STANDARDS
STANDARDS
THERMAL REACTORS
THYROID
VERTEBRATES
WATER COOLED REACTORS
WATER MODERATED REACTORS