BOUNDED MINIMUM INHERENT AVAILABILITY REQUIREMENTS FOR THE SYSTEM DESCRIPTION DOCUMENTS Page: 4 of 19
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DI: B00000000-01717-0200-00147 REV 00
Title: Bounded Minimum Inherent Availability Requirements For
The System Description Documents Page: 4 of 16
The purpose of this analysis is to establish bounded minimum inherent availability
requirements for the Mined Geologic Disposal System (MGDS) System Description
Documents (SDDs). The purpose of the bounded minimum inherent availability is to provide
a lower bound on availability which will allow design to meet throughput requirements while
not affecting the ability of the items to perform their intended safety function.
The MGDS systems and facilities are identified as "Q" in the project Q-List by direct
inclusion. Therefore, the items addressed in this analysis will be treated as Q items. An
activity evaluation has been performed in accordance with QAP-2-0 (Specialty Engineering
(188.8.131.52) dated 8/7/97) and has determined that this analysis is applicable to the QA program.
Therefore, technically this activity is subject to QA controls. However, the activities
associated with performing this work do not affect the ability of the items to perform their
intended safety function. The activities in this analysis can only affect number, configuration,
and cost of the Q items and their ability to meet throughput requirements within the constraints
The following methodology was employed in developing the analysis:
The overall MGDS bounded minimum inherent availability is established as shown in Section
The apportionment of the overall MGDS bounded minimum inherent availability to individual
SDDs is accomplished by applying the mathematical models provided in Reference 5.3, as
shown in Section 7.2 in conjunction with assumption 4.3.1, as follows.
3.1 Establish Overall MGDS Bounded Minimum Inherent Availability (Section 7.1).
3.2 Select and Rank SDDs that have the Potential to Affect Throughput (Section 7.2).
3.3 Apportion Overall MGDS Bounded Minimum Inherent Availability To Selected SDDs
Civilian Radioactive Waste Management System
Management & Operating Contractor
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Booth, L. BOUNDED MINIMUM INHERENT AVAILABILITY REQUIREMENTS FOR THE SYSTEM DESCRIPTION DOCUMENTS, report, March 13, 1998; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc791834/m1/4/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.