Control of Coolant Internal Energy

DOE-STD-6002-96

diversity of such a system, its effectiveness, and speed of action shall be such that safety func-

tions required to meet evaluation guidelines are assured. Consideration shall be given to heat,

particle, magnetic, and mechanical loads on confinement barriers resulting from transient over-

power events and plasma abnormalities (e.g., vertical displacement events or plasma disrup-

tions in tokamaks) in assessing the need for rapid plasma shutdown.

3.1.3 Control of Coolant Internal Energy

For fusion facilities that use liquids for active cooling of components (e.g., water and

cryogenic liquids), the design shall incorporate means to accommodate the accidental release

of the liquid to ensure that confinement barriers are not breached in a manner that could result

in exceeding evaluation guidelines. Special consideration shall be given to the effect of large

spills of cryogenic liquids on the structural integrity of affected structures, systems, or compo-

nents (SSCs) (e.g., embrittlement).

3.1.4 Control of Chemical Energy Sources

Fusion facilities shall be designed such that chemical energy sources are controlled dur-

ing normal conditions, anticipated operational occurrences, and off-normal conditions so as to

minimize energy and pressurization threats to radioactivity and hazardous material confinement

barriers. Design measures shall assure that evaluation guidelines are met.

3.1.5 Control of Magnetic Energy

Magnet systems in fusion facilities shall be designed so that faults in the magnets and the

associated ancillary systems (power supply and electrical systems) shall not threaten public or

worker safety functions.

3.1.6 Limit Routine Airborne and Liquid Radiological Releases

Adequate systems or design features shall be provided to minimize airborne and liquid

radioactive effluents from fusion facilities to meet the limits prescribed in 40 CFR 61, National

Emission Standards for Hazardous Air Pollutants. That limit for members of the public is

0.1 mSv/yr (10 mrem/yr). Fusion facilities must provide a level of protection for persons consum -

ing water from a public drinking water supply that is equivalent to public community drinking

water standards as set forth in 40 CFR 141.16 from National Primary Drinking Water Regula -

tions. This requirement translates into an effective dose equivalent of 40 Sv/yr (4 mrem/yr). In

addition, exposure from all sources of radiation shall not exceed 1 mSv/yr (100 mrem/yr) per 10

CFR 20.1301 from Standards For Protection Against Radiation. The design shall also provide

adequate means for sampling and monitoring of radioactive effluents to the environment.

3.2 Worker Safety Function--Control of Operating Hazards

Workers at the facility shall be protected from routine hazards to a level commensurate

with that of comparable industrial facilities by a combination of administrative controls and