Special Systems - hdbk1132990187

DOE-HDBK-1132-99

1.4

Special Systems.

1.4.1

Radioactive Waste Transfer Lines . During the design of radioactive waste

transfer systems, the following items deserve special consideration to reduce

personnel exposure and the spread of contamination:

leak detection boxes,

valve boxes,

drain-line plug assemblies, and

seal plate locations for pressure testing.

High-Activity Drains . During the design of high-activity drain systems, the

1.4.2

following items deserve special consideration to reduce personnel exposure and

the spread of contamination:

leak detection,

vacuum systems, and

double containment.

Non-Fire Protection Penetration Seals .

1.4.3

Air and Water Seals .

Determine the project criteria for the degree of water and air pressure

retention and acceptable leakage rates at penetrations. Past project

criteria have sometimes imposed unrealistic goals such as zero leakage.

Criteria should be based on calculations or safety analyses that can be

documented.

Select penetration sealant material based on satisfactory performance of

sealant in meeting project water and air retention criteria, compatibility of

sealant with adjacent materials and constructibility.

II-18