Temporary Modifications

DOE-STD-1036-93

If the position or status of a component is changed during performance

of one of these checks, the check does not qualify as an independent

verification. If the affected component was designated in accordance

with Section 4.1, then a separate independent verification of the

positioning change should be performed.

4.2.4

Temporary Modifications

Installing or removing temporary modifications (e.g., jumpers, bypasses,

or other temporary connections) should be independently verified when

an error could cause the shutdown of critical equipment, actuation or

disabling of a safety system, or uncontrolled start of equipment that could

endanger personnel. In these situations, verification should be performed

before and during performance of the activity using concurrent dual

verification.

4.3

Verification Techniques

It is not the intent of this guide to describe appropriate techniques for independent

verification of all the components and processes used throughout DOE facilities.

Each facility should develop instructions for independent verification, using input

from experienced facility personnel and equipment manufacturer's

recommendations. The instructions should describe techniques for independent

verification of manual valves, motor-operated and air-operated valves, solenoid-

operated valves, blank flanges, circuit breakers, removable links, fuses, availability

of control power, accuracy of calculations, etc. Techniques may involve direct

verification (e.g., physically checking that a valve is closed) or indirect verification

(e.g., observing system parameters to determine that a valve is closed).

The instructions should focus the verifier's attention on the aspects of the

operation that are most susceptible to errors and/or are most critical for proper