Good Practices - s1036cn10021

DOE-STD-1036-93

4. GOOD PRACTICES

Each facility should provide written guidelines for implementing independent verification.

Central to these guidelines are two related, but independent, criteria for independent

verification. First, independent verification is clearly important for certain systems and

components, but is not necessary for all facility equipment. Therefore, the facility guidelines

should identify the systems, structures, and components requiring independent verification.

Section 4.1 provides guidance for designating which of these should receive independent

verification.

Second, for those systems, structures, or components that have been designated as requiring

independent verification, there are many routine operating activities performed that require

independent verification. Section 4.2 provides guidance to help determine what situations

involving the designated systems, structures, and components should be identified as

occasions for independent verification.

The methods or techniques used to perform independent verification must be capable of

verifying compliance with the operational criteria, without changing the position or status of

the equipment. Therefore, the facility's guidelines should also specify how independent

verifications should be performed. Examples of techniques that may be applied for

independent verification are given in Section 4.3.

4.1 Systems/Components Requiring Independent Verification

Independent verification should be performed on systems, structures, and components

that impact the safety and reliability of facility operations. Facilities should identify

components requiring independent verification on the basis of safety analysis and

evaluation of the effects that may be caused by mispositioning. Independent

verification should be performed on systems, structures, and components that perform

functions in the following categories: