Other Features - STD-1128-98master0266

DOE-STD-1128-98

Guide of Good Practices for Occupational Radiological Protection in Plutonium Facilities

(including sanitary sewage systems if they may receive some small amount of contamination

during the life of the facility.)

10.2.5 Other Features

Installed decontamination and materials-handling equipment that facilitates operation and

maintenance generally facilitates decommissioning in two ways. First, it can be used for its

intended purposes of cleaning and moving equipment during the decommissioning phase.

Even more important, it usually contributes to a cleaner, better maintained facility, where

nonfunctional equipment is moved out when it is no longer needed and work surfaces are

kept free of spreadable contamination.

Other features include the following:

-- Minimizing service piping, conduits, and ductwork;

-- caulking or sealing all cracks, crevices, and joints;

-- using modular, separable confinements for radioactive or other hazardous materials to

preclude contamination of fixed portions of the structure;

-- using localized liquid transfer systems that avoid long runs of buried contaminated

piping;

-- using equipment that precludes the accumulation of radioactive or other hazardous

materials in relatively inaccessible areas, including curves and turns in piping and

ductwork;

-- using designs that ease cut-up, dismantling, removal, and packaging of contaminated

equipment from the facility;

-- using modular radiation shielding, in lieu of or in addition to monolithic shielding walls;

-- using lifting lugs on large tanks and equipment; and

-- using fully drainable piping systems that carry contaminated or potentially contaminated

liquids.

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