Water Supply - doe-std-1128-98

DOE-STD-1128-98

monitoring instrumentation, certain processing equipment, and any other

essential building systems identified during safety analysis.

Sensitive safety equipment should be tested to verify that it will remain

operable during the switch-over and after enduring the electrical

transient.

Non-critical uses of emergency power should be avoided.

C.5.3

Water Supply

Water-storage tanks with multiple or backup supplies should be provided to

simultaneously supply water for fire protection, processing, and drinking.

The design of the water-supply system shall provide water for firefighting and

automatic sprinkler systems in accordance with the DOE Order 420.1 (DOE,

1995c) and Factory Mutual and National Fire Protection Association Standards.

The fire-protection water supply and distribution design required for critical item

protection should ensure the continuity of protection in the event of postulated

accidents.

Potable water should be distributed to drinking fountains, eyewash fountains,

showers, emergency showers, lavatories, and non-contaminated laboratories. Raw

water may be used in toilets and urinals. The potable water system shall be

protected against contamination (40 CFR 141 and 142 (EPA, 1992a)). Water mains

should not pass through process or controlled areas. Branch lines may be permitted

in process areas for safety showers and fire-protection sprinkler systems only.

The facility water system preferably should be isolated from primary water mains

by an air gap to prevent any possibility of contamination of public water supplies.

If an air gap is not possible, reduced-pressure type of backflow prevention devices

meeting the requirements of the American Water Works Association C506-78-

1983 (AWWA, 1983) should be used. Process water supplied to the process and

controlled areas must be isolated from the potable water system. Cross-connections

should not be permitted.

C.5.4

Fire Protection

Each area in the plant building shall be equipped with fire-detection devices that

are best suited for that area (NFPA National Fire Codes 71 and 72A through 72D

(NFPA latest revisions) (NFPA, 1985)). All equipment should be approved by a

recognized testing laboratory. The spacing, sensitivity, and location of the detectors

should be given careful consideration to ensure rapid response.

All fire detectors and/or automatic fire-suppression systems should be connected to

fire alarm annunciators. The annunciator system should be sufficiently subdivided

to identify the location of a fire.

Fuels and combustible materials should be stored at a central facility that is remote

from the plutonium-processing building(s). Piped natural gas should not be

provided to plutonium process or storage areas. Separate bottled gas systems

should be provided where required.

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