Cooling Systems

DOE-STD-6003-96

m. Facility and building grounding

The facility grounding grid should comply with the procedures and recommendations of

IEEE Standard 80. Grounding within buildings should be in accordance with the NFPA 70.

n. System and equipment grounding

System and equipment grounding should comply with IEEE Standard 142.

o. Cathodic protection

Cathodic protection should be in accordance with the results of soils analysis and resis-

tivity readings. Cathodic protection may be necessary for metal underground pipes and storage

tanks, surface-mounted storage tank bottoms, sheet piling, and the fusion facility confinement

barriers.

p. Lightning protection

The lightning protection system should comply with ANSI Standard C-62 series and

NFPA Standard 780.

6.4.3 Cooling Systems

The cooling systems include all SSCs that remove heat from the facility and transfer it to

a heat sink such that

thermal, hydraulic, and mechanical parameters are within design limits for the cooling

system, fusion device, confinement barriers, and other safety-class equipment;

a leaktight barrier is maintained against uncontrolled release of radioactive and other

hazardous materials to the environment.

The cooling system includes coolant makeup systems and collection and disposal sys-

tems for spilled or drained coolant.

A number of fusion facility components may require cooling during normal operation and

off-normal events. These include the first wall, divertor, shield wall, cryostat, vacuum pumps,

magnet coils, and so on.

In addition to the general design guidance in Section 6.1, the following system-specific

design guidance is provided.

a. Structural design should consider service temperatures and other conditions of the

boundary materials; the uncertainties in determining material properties; effects of

irradiation on those properties; residual, steady-state, and transient stresses; and size

of flaws.

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