ML20093F622
| ML20093F622 | |
| Person / Time | |
|---|---|
| Site: | Washington State University |
| Issue date: | 10/03/1995 |
| From: | Wilson W WASHINGTON STATE UNIV., PULLMAN, WA |
| To: | Mendonca M NRC |
| Shared Package | |
| ML20093F626 | List: |
| References | |
| NUDOCS 9510180056 | |
| Download: ML20093F622 (3) | |
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{ Washington StateUniversity=
. Nuclear Radiation Center -
Pullman, WA 99164-1300 '
509-335-6641 FAX 509-335-4433 '
October 3,1995
- Marvin Mendonca Sr. Project Manager U.S. Nuclear Regulatory Commission Office of Non-Power Reactors
- MS 0-11-B-20
- Washington, DC 20666
Dear Mr.Mendonca:
J I understand that relicensing now requims a consideration of the reliability of previously used reactor com mnents. Attached is a draft of a brief document on this subject for the WSU TRIGA mactor. Is (lis analysis adequate or is something more detailed required?
Sincerely, WEWh
^
W.E. Wilson Consultant 1
i r/00i0 j
I 9510100056 951003 V}
g PDR ADOCK 05000027 9
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APPLICATION FOR TEN YEAR LICENSE EXTENSION FOR FACILITY LICENSE NO. R-76 FOR THE WASHINGTON STATE UNIVERSITY MODIFIED TRIGA NUCLEAR REACTOR CONSIDERATION OF RELIABILITY OF EXISTING PREVIOUSLY UTILIZED REACTOR COMPONE S
of the WSU modified TRIGA Reactor which was converted to %s the various components It is not possible to accurately quantify or predict the relial
@tKW type reactorin s to improve 1%7. Over the years the reactor systems have been up ber
. performance and insure reliability as follows.
1) 1%7 - MT plate type fuel replaced with TRI typffuelin 4-rod usters. Pool cooling system mstalled allowing operationgto W rthvel of 1,000 MW. Pulse rod added to center of core and control system modif
' allow pulsing operation.
2) 1972 - New Argon-41 monitoring stem designed a i
led.
I 3) 1972 - General Atomic wide range e
to contro system replacina old GE-startup channel and Long-N and peri ch E linear channel replaced with new Keithly channel.
4) 1976 - Replaced sev GA Stan 4-rod fuel clusters in the center of the core with FLIP HEU f placed old od standard cluster containing pulse rod with a new FLIP 3-roj,i u clus r Standard f led instrumented fuel rod replaced with FLIP fueled instrument
. JCydNv contains 35 FLIP fuel rods.
5) 1977 -
entire n glyystem and console with new one designed and installed by j
l react 6) eplaced a d tional four (4) standard fuel 4-rod clusters with 4-rod FLIP fuel rods i
ad FLIP fu rods. Com now contains a total of 51 FLIP fuel rods.
l d primary cooling water mechanical pressure indication system 7) 1983 - S o aplaced wi transducmg with electrical readout in the control room.
8) 1985 - FLIP instrumented fuel element replaced with a new one due to failure of thermocoupled in the IFR installed in 1976.
9) 1987 - Pool room ventilation upgraded with new fans and central heating within ventilation system for pool room. OIS umt heating on walls of pool room removed.
10) 1988 - New CIC installed on safety channel #2. Com optimized increasing thermal neutron flux in rotator row by 30%.
11) 1991 - Computer interface installed to allow computer monitoring of reactor power level.
)
12) 1992 - Power supply for wide range channel installed.
13) 1993 - New wide range channel urchased to be installed in the future. New air
?
monitoring system purchased to x installed in the future.
j In order to insure the reliability and adequate performance of all portions of the WSU TRIGA reactor system, a very extensive and comprehensive preventative maintenance program has j
been conducted at the facility for a number of years. A copy of SOP #3 which covers the
- preventative maintenance program is attached. This program has proven to be more than adequate i
to preclude operation of the reactor with a faulty or inoperative portion of the system.
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