ML20076B005
| ML20076B005 | |
| Person / Time | |
|---|---|
| Site: | 05000375 |
| Issue date: | 02/08/1979 |
| From: | Swanson V ROCKWELL INTERNATIONAL CORP. |
| To: | |
| Shared Package | |
| ML20076B003 | List: |
| References | |
| N001ER100004, N1ER100004, NUDOCS 7905080513 | |
| Download: ML20076B005 (3) | |
Text
-
i.
I e NUMBSR REV LTR/CHG NO.
w innt.m m i.e
. - - .SUPPORTlNG D0CUMENT N001ER100004 ... su . o, e a DOCUMENT T YPE rROc n Av. tit LE ENGINEERING REPORT L-85 REACTOR KE y nouns
_ REACTOR OPERATION DOCUMErit TITLE ORIGINAL ISSUE DATE L-85 REACTOR - ANNUAL OPERATIONS FOR THE YEAR 1978 GONO. S/A NO. PAGE 1 OF TOTAL PAGES d PREPARE D BY/DATE ,
DEPT MAIL ADDR 094117 R E L D A,T,E V. A. Swanson. ( 7 31 T093 SECURITY CLASSlFICATeON
' Y (CHECK ONE BOX ONLY) (CHECK ONE BOX ONLY) lH&D PROGR AM7NeYES O' ' E ir vES. ENTER TPA NO.. ERDA DOD RESTRICTED O APF ROV ALS
'OATE UNCL O O o^7^
M. E. Remle ~ CONF. O O ,DE' y FO. " O J. H. Walter O M ,'L%fx[
SECRET O O
[
, AUTHORIZED DATE j
l CLASSIFIE R DISYBOEUTION ABSTRACT X. N A A*E lA R This report preseru a summary of the reactor operations Johnson, V.A. (25) 'A34 L and related activities conducted at the L-85 Reactor
- Maki, L M' LS39 during 1978. This satisfies a reporting requirement
- Paschali,R .K. JB05 in the facility technical specifications.
- Remley, M.E.
NBl3
- Schumann, G.
T093
- Swanson,-V.A.
T093
- Tuttle, R.J.
NB13
- Twichell, P.W.
JB05
- Walter,'J.H.
T006
- Wieseneck, H.C.
LA21 v
l l
l RESERVED FOR PROPRIETARY / LEG AL NOTICES l
.)(- COMPLETE DOCUMENT NO ASTERISL TITLE PAGE/
SUMMARY
e '
OF CHANGE PAGE ONLY
[
FORM 734-C REV.11-75 7QO%ORO (/T
. , - g i NO N001ER100004 Rockwellintemational
. Energy Systems Group PAGE 2 1
f
- 1.
SUMMARY
OF OPERATING EXPERIENCE The L-85 Reactor was operated without incident during calendar year 1978. Three hundred eight (308) runs were made for a total integrated thermal power output of 560,691 watt-hours. Two hundred thirty-nine (239) runs were for neutron radiography, sixty-four (64) for training programs, and five (5) for routine checks.
- 2. EMERGENCY SHUTDOWN AND INADVERTENT SCRAMS Five inadvertent scrams occurred during the year. All five were caused by electrical noise entering the core pressure electronic trip channel.
A digital panel meter (DPM) was connected to the recorder output of the electronic trip channel during the time the scrams occurred and electrical switching noise was apparently being picked up by the DPM or the connecting wiring and causing the scrams. All scrams operated properly and scram levels were not exceeded.
- 3. MAJOR MAINTENANCE OPERATIONS The electrical cable connecting the " magnets coupled" microswitch on Safety Rod #2 to the startup interlock circuit opened up and prevented a reactor startup. The cable-pulley system was replaced by a retractable cable system.
The sensor bulb of a thermostat which limits the temperature of the cold water tank in the core cooling system, separated from the tubing connecting it to the controller. This caused the freon compressor to shut off at a higher temperature than normal in the cold water tank. No safety related problems were involved. The broken thermostat, along with another identical unit in the cold water tank, were removed and replaced by thermo-stats with sensor bulbs inside of stainless steel wells.
Other normal maintenance and minor repairs were performed as required.
- 4. CHANGES TO FACILITY AND PROCEDURE A battery powered emergency power system was installed which supplies power to the reactor room gamma monitor in the event of a power outage in the facility. This system will be expanded to include the core pressure readout as soon as electrical noise problems, which have resulted F OR M 719-P R EV. 7 78
e.
NO N001ER100004 Rockwellinternational Energy Systems Grou; PAGE 3 i
in the electronic trip channel when connected to the system, can be resolved.
- 5. RELEASE OF RADI0 ACTIVE EFFLUENTS No uncontrolled radioactive effluents were released or discharged to the environs during the year.
- 6. ENVIRONMENTAL SURVEYS Environmental surveys are performed by the Radiation and Nuclear Safety Unit by sampling soil, vegetation, water and air up to a distance of 10 miles from Energy Systems Group, California sites. A report by J. D. Moore
- describing the monitoring procedures and results for 1978 j summarizes these surveys. This report concludes that environmental radioactivity observed by the monitoring is due to natural sources and to fallout of radioactive material from foreign atmospheric testing of nuclear devices rather than to Energy Systems Group operations at California sites.
O
- J. D. Moore, " Energy Systems Group Environmental Monitoring and Facility Effluent Annual Report - 1978" l
l F O R M 719-P R E V. 7 78 N_