ML20082M845
| ML20082M845 | |
| Person / Time | |
|---|---|
| Site: | 05000112 |
| Issue date: | 12/01/1983 |
| From: | Jensen C OKLAHOMA, UNIV. OF, NORMAN, OK |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8312060301 | |
| Download: ML20082M845 (2) | |
Text
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So-ll 2 9a LIniversity of 0klahoma SCHOOL OF AEROSPACE, MECHANICAL AND NUCLEAR ENGINEERING 865 Asp Avenue. Room 212 Norman, Oklahoma 73019 (405) 325-5011 December 1, 1983 Mr. Darrell G. Eisenhut, Director Division of Licensing U.S.N.R.C.
Washington, D. C. 20555
Dear Mr. Eisenhut:
I recently received Amendment No. 10 to the Facility Operating License No. R-53 for the University of Oklahoma AGN-211P. During review of the technical specifications returned to me, I found they had been submitted containing references in paragraphs 5.6 and 5.8 to water monitor pump and radiation scrams. During discussions with Mr. Hal Bernard of the NRC and the NRC contractors from Los Alamos Scientific Laboratory, it was concluded that the reactor could be operated safely without these scrams. The scrams were, therefore, deleted from chapter 3 and reference to them in chapter 5 should also have been deleted but it was not.
I would appreciate having the following changes to the technical specification made by amendments.
Paragraph 5.6 to read, 5.6 Water Purification System The water purification system consist; of a demineralizer and circulating pump to maintain the water purity. The water loop has a radiation monitor and conductivity meter, both outputs being displayed at the console.
Paragraph 5.8 to read, 5.8 Instrumentation and Controls The neutron flux in the reactor is monitored by two neutron detectors near the reactor core and corresponding flux indicated on the console. These detectors are connected respectively to a logarithmic micro-microammeter and a linear microammeter. Strip chart recorders record the output of both channels.
8312060301 831201 PDR ADOCK 05000112 P PDR 8/Y
Mr. Darrell G. Eisenhut, Director December 1, 1983 Page 2 Each of the indicators is connected to a scram circuit so that if any indicator reads above or below the respective limiting safety system setting, it disengages the holding magnets, and shuts down the reactor. A rate, or period scram, is connected to the logarithmic channel to prevent too rapid a power rise. Additional safety interlocks provide for a reactor shutdown if the water level drops 9 inches below the top of the reactor tank or the water temperature falls below 5'C.
The rods are controlled by manual hold-down switches, the two control rods having a normal and slow speed.
The positions of the control rods are indicated to 0.01 cm on the console. Sequenced interlocks of the control rod drive switches require that only one safety rod may be moved at a time, and that both safety rods be fully withdrawn before the coarse control rod can be moved.
I am sorry for the inconvenience this has caused you. If you have any .
further questions, please contact me at (405) 325-5011. 1 Sincerely, T
Crai . ensen Rea or- ? rector CMJ:feo i
i
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