ML20100E092
| ML20100E092 | |
| Person / Time | |
|---|---|
| Site: | Vallecitos Nuclear Center |
| Issue date: | 12/31/1984 |
| From: | Cunningham G GENERAL ELECTRIC CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8504030269 | |
| Download: ML20100E092 (6) | |
Text
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4 GENERAL ELECTRIC NUCLEAR TEST REACTOR Aff4UAL REPORT NO. 25 LICENSE R-33 DOCKET 50-73 NUCLEAR FUEL ENGINEERING DEPARTE NT e GENERAL ELECTRIC COMPANY VALLECITOS NUCLEAR CENTER, PLEASANTON, CALIFORNIA 94566 GENERAL $ ELECTRIC sp 8504030269 841231 30 140 DR ADOCK 050 3
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s GENERAL ELECTRIC NUCLEAR TEST REACTOR APMJAL REPORT NO. 25 I.
INTRODUCTION This report smmarizes the operation, changes, tests, experiments and major maintenance at the Nuclear Test Reactor (NTR) which were authorized pursuant to License R-33 and 10CFR50, Section 50.59, for the period January 1, 1984, through Decent >er 31, 1984.
II.
GENERAL A.
The reactor was operated at or above critical for 386.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
A total of 378 startups were made.
Four (4) scrams occurred during this report period. Total plant operation equalled 1.34 MW days in 1984.
B.
The average radiation exposure to facility personnel was 1.897 Rem.
C.
There were no occurrences durIng 1984 that required notification of the NRC.
D.
License R-33 was renewed by Amendment 18 issued on Decent >er 28, 1984.
The expiration date is October 31, 1997.
III. ORGANIZATION No changes were made to the facility organization during the 1984 report period.
IV. CHANGES, TESTS, Ato EXPERIMENTS APPROVED BY THE FACILITY MANAGER A.
Changes Pursuant to 10CFR50.59(a), the Facility Manager authorized the following changes during 1984.
1.
Remote Area Monitoring (RAM) System Replacement
==
Description:==
The obsolete RAM system was replaced with a newer RAM system.
Safety Analysis:
The new R#4 system specifications exceed those of the old system. The system was conpletely tested after installation.
2.
Cell Door Alarms
==
Description:==
The door alarms to two cells were modified to eliminate distractions.
Safety Analysis:
The control of these two High Radiation Areas still fully conplies with 10CFR20.203(cX2).
i.
1, NTR Annual Report No. 25 A.
Changes (Continued) l 3.
Voltage Regulator
==
Description:==
A voltage regulator was added to the facility to supply the stack instrunentat ion, the nuclear Instrunents, and the area radiation monitors with regulated power.
Safety Analysis:
The addition of the voltage regulator increases instrunent performance and reliability.
4.
Stack Particulate Monitor
==
Description:==
This change authorized the replacement of the NTR stack effluent particulate monitor log count rate meter (LCRM) and preamp.
Safety Analysis:
The replacement LCRM and preamp are conmercially available instrunents suitable for this application..The units will be performance tested after installation prior to final acceptance.
5 Stack Gas Monitor Instrunent Replacement
==
Description:==
The stack gas monitor picoanmeter was replaced.
Safety Analysis:
The replacement picoanmeter perfonnance specifications equalled or exceeded the specifications of the previous unit.
The unit was performance tested after installation prior to final acceptance.
B.
Tests Pursuant to 10CFR50.59Ca), there were no special tests performed during 1984 which required the approval of the Facility Manager.
C.
Experiments There was a total of 740 individual experiments reviewed, approved and performed in 1984.
Three experiment type approvals (ETA) were reviewed and approved by the Facility Manager during 1984.
These ETA's were updates of old experiment type approvals previously described in the Sunnary Safeguards Report for t
the General Electric Nuclear Test Reactor or as specified in annual reports submitt.ed since the safeguards report.
There were no nm types of experiments olther approved or performed during 1984.
4,
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NTR Annual Report No. 25 V.
MAJOR PREVENTIVE OR CORRECTIVE MAINTENANCE There were no problems during 1984 that required major maintenance.
VI.
UNSCHEDULED SHUTDOWNS l
There were four (4) reactor scrams during 1984.
Each scram was from a different source.
One scram was initiated by the operator during an earth-quake; one scram was caused by an AC power dip; one scram was operator error; and one was due to safety rod release (unexplained).
There was no corrective action required which prevented restart of the reactor shortly after shutdown.
VII. RADIATION LEVELS AND SAMPLE RESULTS AT ON-AND OFF-SITE MONITORING STATIONS The data below are from sample and dosimeter results accunulated during 1984.
Except for the NTR stack data, these data are for the entire VNC site and include the effects of operations other than the NTR.
1.
NTR Stack.
Total airborne releases (stack emissions) for 1984 are as follows:
Alpha Particulate
< 0.142 pCI (predominantly radon-thoron daughter products)
Beta-Ganma Particulate
< 1.59 pCI Iodine-131
< 31.33 MCI Noble Gases 1.94 x 10 Cl Noble gas activities recorded from the NTR stack integrates background readings with the actual releases which may account for 40 to 50% of the activity released.
2.
Air Monitors.
(Yearly average of all meteorological stations.)
Four environmental air monitoring stations are positioned approximately 90o apart around the operating facilities of the site.
Each station is equipped with a menbrane filter which is changed weekly and analyzed for gross alpha and gross beta-ganma.
Alpha Concentration:
-15 Maxinun
< 6.1 x 10 pCI/cc
-15 Average
< 2.7 x 10 pCI/cc Beta-Ganma Concentration:
Maxinun 2.2 x 10 pCI/cc Average
< 4.43 x 10 pCI/cc 3.
Ganma Radiation. The yearly dose results for the year 1984 as determined from evaluation of site perimeter TLD environmental nonitoring dosimeters showed readings within normal background.
..g NTR Annual Report No. 25 4.
Vegetation.
No alpha, beta, or ganma activity attributable to activities at the NTR facility was found on or in vegetation in the vicinity of the site.
5.
Water.
There was no release of radioactivity in water or to the ground water greater than those limits specified in 10CFR20, Appendix B, Table II, Colum 2.
6.
Off-Site.
Sanples taken off the site Indicate normal background for the area.
VIII. CONCLUSION The overall operating experience of the Nuclear Test Reactor reflects another year of safe and efficient operations.
There were no unusual occurrences or reportable events. Updated equipment and procedures should provide increased reliability in the ensuing years.
GENERAL ELECTRIC COMPN 4Y Irradiation Processing Operation By L. L. Reed, Manager Advanced Nuclear Applications
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GENERAL $ ELECTRIC 4
NUCLEAR ENERGY BUSINESS OPERATIONS GENERAL ELECTRIC COMPANY e VALLECTOS NUCLEAR CENTER e PLEASANTON, CALIFORNIA 94566 i
March 26, 1985 1
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Dr. H. R. Denton, Director Office of Nuclear Reactor Regulation i
U.S. Nuclear Regulatory ConTnission Washington, D.C.
20555 j
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Reference:
License R-33, Docket 50-73 i,
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Dear Dr. Denton:
Enclosed are three signed and forty conformed copies of /onual Report No. 25 for the General Electric Nuclear Test Reactor.
l j-Sincerely, cy. {. (-'
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G. E. Cunningham j
Senior Licensing Engineer (415) 862-2211, Ext. 4330
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