Special controls and considerations at uranium Operations

Radiological Assessor Training

DOE-HDBK-1141-2001

Instructor's Guide

Review DOE-STD-1121-99,

DOE-STD-1121-99, Internal Dosimetry, provides

Internal Dosimetry.

technical guidance on internal dosimetry

programs, including evaluation of occupational

internal doses from exposure to radon and

thoron. This standard should be reviewed prior

to conducting assessments of internal dosimetry

programs.

VII.Special controls and considerations at uranium

Show OT 6.11.

operations

Obj. 5

Describe special controls and

A. Criticality alarm systems (gamma or neutron)

considerations required for

shall be provided in each area where an

uranium operations.

accidental criticality is possible. Site

requirements documents relating to criticality

alarms should be reviewed prior to the

assessment, if applicable. These

requirements may include: ANSI/ANS 8.1,

Nuclear Criticality Safety in Operations with

Fissionable Materials Outside Reactors;

ANSI/ANS 8.3 Criticality Accident Alarm

Systems; ANSI/ANS 8.7, Nuclear Criticality

Safety in the Storage of Fissile Materials;

ANSI/ANS 8.15, Nuclear Criticality Control of

Special Actinide Elements; and ANSI/ANS

8.19, ANS Administrative Procedures for

Nuclear Criticality.

B. All DOE facilities that possess sufficient

quantities and kinds of fissile material to

constitute a potentially critical mass shall

provide nuclear accident dosimetry (fixed and Reference 10 CFR 835.1304.

personal). The number of dosimeters

needed and their placement will depend on

the nature of the operation, structural design

of the facility, and accessibility of areas to

personnel. An analysis of the dosimeters

and their placement should be conducted

and documented.

Module 6 11