Documented Safety Analysis for Decommissioning

DOE-STD-1120-2005/Vol. 1

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DOCUMENTED SAFETY ANALYSIS FOR DECOMMISSIONING

As described in 10 CFR 830, Subpart B, Appendix A, Table 2, contractors may prepare a DSA

by using the method described in DOE-STD-1120-98, or successor document, and the provisions

of 29 CFR 1910.120 or 29 CFR 1926.65, Hazardous Waste Operations and Emergency

Response (HAZWOPER). Derivation of controls is also necessary for facility decommissioning

projects that involve more than "low level residual fixed radioactivity." DSAs must also be

compliant with the general requirement of 10 CFR 830.204, Documented Safety Analysis, which

require (1) facility and work description; (2) systematic identification of natural and man-made

hazards associated with the facility; (3) evaluation of normal, abnormal and accident conditions;

(4) derivation of hazard controls; and (5) description of safety management program

characteristics, including criticality safety.

As explained in Section 1.1 of this Standard, the DSA isn't expected to address the full scope of

standard industrial hazards and controls typically covered by HAZWOPER. An acceptable DSA

format and content that meets the requirements of 10 CFR 830.204 and the provisions described

in 10CFR 830, Subpart B, Appendix A, Table 2 is described according to the sections given

below. An overview of the DSA format is shown in Figure 2. While these topics may be

described in a HAZWOPER health and safety plan, it is recommended that information be

presented in a separately prepared DSA, providing a clearer distinction of facility safety basis

information that is subject to the Unreviewed Safety Question process.

Decommissioning projects that have only low level residual fixed radioactivity are not expected

to have the potential for accidents involving significant radiological consequences. This is

reflected in 10 CFR 830.205(c), which states that Technical Safety Requirements (TSRs) are not

required for this type of activity. The DSA format for this type of decommissioning activity may

exclude topics related to accident analysis (Section 3.2.3), safety SSCs (Section 3.3) and TSR

derivation (Section 3.3.1).

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