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Methodology - s3007cn10014
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DOE-STD-3007-93
For Example:
All calculations documented in this evaluation were performed on an IBM
Model 320 RISC 6000 workstation operating under AIX Version 3.1 with
Version 1.1 of the Fortran Compiler. Configuration Release 1.10 of the KENO-
V.a code with Hansen-Roach cross section data were used for this evaluation.
More detailed configuration information is given in Reference .
5.0 DISCUSSION OF CONTINGENCIES
Compliance with the double contingency principle, as stated in DOE Order 5480.24 and
DOE O 420.1, Section 4.3, and the requirements of Section 4.1.2 of ANS-8.1 should be
demonstrated in this section. This may be done by several different methods. Two possible
methods are listed below.
1.
List the independent unlikely events, at least two of which must occur concurrently before
a criticality accident could be possible. Describe the controls, conditions, etc. that ensure
that no credible single failure will result in a criticality. An illustration of this method is
given below (format shown is not a requirement).
Contingency
No.
Description
Barriers
1
Unlikely Event # 1
Controls, conditions, etc. that make Event
# 1 unlikely
2
Unlikely Event # 2
Controls, conditions, etc. that make Event
# 2 unlikely
2.
If control of two independent parameters is not practical, DOE 5480.24 and
DOE O 420.1, Section 4.3, allow a system of multiple controls (at least two) on a single
parameter. The overall likelihood of concurrent failure of these controls should be
comparable to two unlikely events as discussed in Method 1. The basis for controlling a
single parameter as opposed to the preferred method of controlling two independent
process parameters should also be documented in this section. An illustration of this
method is given below (format shown is not a requirement).
Controls
Control Parameter
No.
Description
Parameter
1
Describe Control # 1
.
.
.
N
Describe Control # N
6


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