Operational Safety Review

DOE-STD-3015-2004

d. When disagreement between the NNSA Site Office Manager or NA-15, as applicable,

and the NNSA/SC-NESD exists as to whether the appropriate form of NES

evaluation is an NCE or a NESS.

There are two types of NESSs: Master and Operation-specific Studies. NES Master

Studies evaluate facilities, equipment and tooling, processes, and management systems

that are common to many NEOs. Operation-specific NESSs include the interfaces with

applicable Master Studies.

5.2 OPERATIONAL SAFETY REVIEW (OSR)

In an OSR, the NESSG evaluates authorized, ongoing NEOs to determine if controls

remain adequate to meet the three DOE NES Standards and other NES criteria as defined

in DOE O 452.2. The scoping of OSRs is to be consistent with the relevant NES Master

Study or operation-specific NESS.

An OSR must be performed for authorized NEOs in accordance with DOE O 452.2.

5.3 NUCLEAR EXPLOSIVE SAFETY CHANGE EVALUATION (NCE)

In an NCE, the NESSG determines if a proposed change, or new information, reduces

assurance of meeting any of the three DOE NES Standards and other NES criteria.

An NCE must be performed when determined to be necessary by the NES change control

process.

6. NESSG PERSONNEL REQUIREMENTS

The term NESSG personnel includes chairs, other members, and Senior Technical Advisors

(STAs). A NESSG is a specific composition of NESSG personnel convened to perform a

NES evaluation.