ML20210B777
| ML20210B777 | |
| Person / Time | |
|---|---|
| Site: | University of Missouri-Columbia |
| Issue date: | 09/12/1986 |
| From: | MISSOURI, UNIV. OF, COLUMBIA, MO |
| To: | |
| Shared Package | |
| ML20210B763 | List: |
| References | |
| NUDOCS 8609180164 | |
| Download: ML20210B777 (6) | |
Text
k APPENDIX A PROPOSED TECHNICAL SPECIFICATION CHANGES 8609180164 860912 6 ADOCK 0500 DR
T ECHNIC Al SPECIFIC ATION
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UNIVERSITY OF MISSOURI g, RESEARCH RE ACTOR F ACILITY Number 3.8 Page 1 of 2 Date
SUBJECT:
Reactor Fuel Applicability .
This specification applies to fuel elements used in the reactor core.
Objective The objective of this specification is to assure that the reactor fuel is operated within acceptable design considerations thus maintaining fuel integrity.
Specification
- a. The peak burnup for UA1x intermetallic fuel shall not exceed a calculated ]
2.3 x 1021 fissions per cubic centimeter. ]
- b. The reactor will not be operated using fuel in which anomalies have been detected or in which dimensional changes of any coolant channel between fuel plates exceed ten (10) mils.
c .- The reactor core shall consist of eight fuel assemblies for which the l associated power peaking results in a greater than or equal maximum allow- ]
able power than that given in figures 2.0, 2.1, 2.2 of specification 2.1 ]
for the various combinations of core flow rate, reactor inlet temperature ]
and pressurizer pressure. Exception: The reactor may be operated to -
]
100 watts above shutdown power on less than eight assemblies or with greater power peaking for purpose of reactor calibration or multiplication studies. ]
- d. All fuel elements or fueled devices outside the reactor core shall be stored in a geometry such that the calculated Keff is less than 0.95 under all con- ]
ditions of moderation.
g- ,s TECHNIC AL SPECIFIC ATION
')
7 UNIVERSITY OF MISSOURI gp RESEARCH REACTOR F ACILITY
- ' Number 3.8 Page 2 of 2 Date
SUBJECT:
Reactor Fuel (continued)
- e. Irradiated fuel elements shall be, stored in an array which will permit sufficient natural convection cooling such that the fuel element tempera-ture will not exceed design values.
Bases ,
- a. The fuel burnup limit restricts the peak fissions per cm burnup 3
to ]
values correlated to result in less than a 10% swelling of the fuel plates. It has been found that fuel plate swelling of less than 10%
has no detrimental effect on fuel plate performance. (Ref. License: '
R-103 Change No. 4 dated August 12, 1968, Change No. 6 dated November 25,.1970, and Amendment No. dated September 12,1986). ]
- b. Specification 3.8.b assures that fuel elements which have been inspected and found to be defective are no longer used for' reactor operation. ,
- c. To assure the validity of the safety limit curves (specification 2.1) ]
and other safety analysis, specification 3.8.c limits the core to eight
- ]
fuel elements and their maximum power peaking for operation at any ,]
significant power level,
- d. The limits imposed by specifications 3.8.d and 3.8.e are conservative and assure safe fuel storage.
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, 4-~ TECHNIC AL SPECIFIC ATION UNIVERSITY OF MISSOURI gp RESEARCH REACTOR F ACILITY Number 4.1 Page 1 of 2 Date i
SUBJECT:
Reactor Fuel Applicability .
This specification applies to reactor fuel elements.
Objective The objective of this specification is to assure that reactor fuel elements are of the type designed for use in the reactor.
Specification
- a. Each reactor fuel element shall contain 24 fuel-bearing plates with nominal active length of 24 inches and plate thickness of 0.05 inches. The nominal distance between plates shall be 0.080 inches. Plate nominal cladding thickness shall be 0.015 inches.
- b. The fuel meat shall be fully enriched uranium 235 aluminide UAl x and the ]
nominal composition of the powder used to make the fuel meat shall not ]
exceed 50 volume % UAlx powder. ]
- c. The fuel meat may include Boron carbide loaded as a burnable poison. The ]
Boron carbide shall not exceed 0.05 grams (84 C) per cubic centimeter. ]
)- ~
TECHNICAL SPECIFICATION UNIVERSITY OF MISSOURI gp RESEARCH REACTOR FACILITY Number 4.1 Page 2 of 2 Date
SUBJECT:
Reactor Fuel . (continued)
Bases The fuel elements for the University of Missouri reactor are one of a con-figuration ~ (aluminide UAlx plate type) successfully and extensively used for ]
many years in test and research reactors. The specifications require fuel ]
content and dimensions in accordance with design basis criteria for proper heat transfer and can be safely used to the burnup limits of Technical Specification ]
3.8. ]
Reference:
(1) Hazards Summary Report, July 1965, Section 4.2 (2) Hazards Summary Report, July 1965, Section 5.5 (3) Letter, September 12, 1986, University of Missouri to ]
Nuclear Regulatory Commission requesting amendment ]
No. to R-103 License. ]
TECHNIC AL SPECIFIC ATION
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UNIVERSITY OF MISSOURI gp _RESEARCH REACTOR F ACILITY
'v Number 5.5 Page 1 of 1 Date
SUBJECT:
Fuel Elements Applicability This specification shall apply to the surveillance of the reactor fuel elements.
Objective The objective of this specification is to reasonably assure proper per-formance of the reactor fuel.
Specification One fuel element from each consecutively numbered series of eight elements ]
will be randomly selected and the fuel plates inspected for anomalies after a ]
peak fuel element burnup corresponding to greater than 90 percent of the peak ]
burnup limit (specification 3.8.a). If all of a series of eight elements are ]
removed from use before they reach 90 percent of the peak burnup limit, then cne ]
of the four fuel elements with the higher average power histories will be ]
inspected. ]
Bases The specified inspections of fuel ' elements provide for the detection of anomalies resulting from reactor operation and therefore reduce the possibility that fission products could be released to the reactor coolant.
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