Development of a RAMI Program for LANSCE upgrade Page: 4 of 4
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effective manner. The Availability Model is being
assembled and complemented with Root-Cause
Analysis and Maintenance Policy.
This work is supported by Los Alamos Nadanal
Laboratory Institutional Supporting Research. 'under
the auspices of the United States Department of
LANSCE 1.5 Upgrade
R. A. Jameson, R. S. Mills, M. D. Johnston,
"Management Information for LAMPF", LA-
5707-MS Infonnal Report, UC-28, LASL,
 Report of the Committee on a TA-53 Upgrade,
Chapter 5, Arch Thiessen (Chairman), Los
Alamos National Laboratory Report.
 C. Wilkinson, Development of a Reliability,
Availability, Maintainability, and
Inspectability Model for High Power
Accelerators, Los Alamos National Laboratory
LDRD Report, in preparation.
 E. E. Lewis, Introduction to Reliability
Engineering, published by John Wiley &
 R. Hutson, Preliminary Availability Analysis
of PSR/LANSCE Pulsed Power Systems (For
Five-Year Peric.i, 1988-1992, Cycles 51-62),
Los Alamos National Laboratory, AOT-2
Technical Notes, Sept. 30, 1994.
Table 3: Availability-Model Database for RIKI
Subsystem Component Function MTF (days) MTR (h) Spares Avail.
PM Magnet current connections magnet 20000 6 Parts 0.999988
FR Coils magnet 10800 340 1 0.998690
FER r'harging system:
FR PS,Sorenson DCR 600-8T magnet 3600 4 1 0.999954
FR PS, Christie 1C015-600EBBX4S magnet 3600 8 some parts 0.999907
FR ResonateChargeSCR magnet 3600 8 3 0.999907
FR Zener Diode Assembly magnet 1000 5 3 0.999792
PM Charge RecoverSCR magnet 3600 8 3 0.999907
FR FreewheelSCR magnet 3600 8 3 0.999907
FM Transfer Chassis magnet 1800 1 6 0 0.989630
FR Controls and Interlocks:
FR RIKI01 Run Permit safety 3600 1 Parts 0.999988
FR NIM Crate safety 1800 8 Parts 0.999815
FR Short Nim Crate safely 1800 8 Parts 0.999815
FR Computer Interface:
RR CAMAC control/data 7300 4 7 0.999977
Sub. Avail 0.997280
Table 4: Comparison of observed availability and availability predicted with
Availability Model All availahilities are in nercenuaees.
LI)KI RIKI SRIIM SRFK Total
Observed 99.1 98.8 96.5 97.8 92.4
Predicted 97.7 99.7 98.6 98.4 94.6
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Chan, K.C.D.; Hutson, R.L.; Macek, R.J.; Tallerico, P.J. & Wilkinson, C.A. Development of a RAMI Program for LANSCE upgrade, article, May 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc696100/m1/4/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.