Guidance for Meeting Regulatory Limits

DOE-STD-6003-96

Routine occupational exposure should not exceed

BTLV =

(2)

where

BTLV = the threshold limit value for the magnetic field in millitesla (mT)

C = a constant equal to 60 mT-Hz

f = the field frequency in Hertz (Hz).

At frequencies below 1 Hz, the threshold limit value is 60 mT. The magnetic field

strengths in these limits are root-mean-square (rms) values.

For workers wearing cardiac pacemakers, the threshold limit value may not protect

against electromagnetic interference with pacemaker function. The threshold limit for pace-

maker wearers should be reduced by a safety factor of 10.

In the future, this Standard will adopt modifications of the ACGIH threshold limit value for

magnetic fields.

2.4 Guidance for Meeting Regulatory Limits

This section provides guidance for calculational procedures to meet the regulatory limits

given in DOE-STD-6002-96. Guidance on the types of off-normal analyses required to meet

these regulatory limits is provided in Section 5.4 of this Standard.

2.4.1 Evaluation Guidelines

Evaluation Guidelines (EGs) are accident impact criteria established for the purpose of

evaluating the acceptability of facility safety design. For radionuclide releases, criteria are given

for ED and are termed "dose values." It is important to note that these criteria do not necessarily

constitute acceptable limits for human health impacts in the event of an accident. Rather, they

are used to evaluate the level of safety associated with the design of the facility with respect to

the risk from low-probability accidents. EGs are typically established using a risk-based frame-

work. Higher dose values are associated with lower frequency to provide balance in the design

with appropriate focus at both the high- and low-probability ends of the accident frequency

scale. Dose values are given for normal operation and anticipated operational occurrences.

A second set of dose values is given for off-normal conditions. Events with an estimated fre-

quency of <106/yr are considered hypothetical, and comparison to an EG is not required. The

method is comparable to that established in DOE Standard 3009, Preparation Guide for U.S.

Department of Energy Nonreactor Nuclear Facility Safety Analysis Reports. EGs are provided

for off-site (public) locations.