ML20065B754
| ML20065B754 | |
| Person / Time | |
|---|---|
| Site: | Vallecitos Nuclear Center |
| Issue date: | 12/31/1993 |
| From: | Cunningham G GENERAL ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9404040115 | |
| Download: ML20065B754 (8) | |
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March 2.5,1994 U.S. Nuclear Regubory Commission Washington, D.C.
20555 Attention: Document Control Desk
Reference:
1.icense R-33, Docket 50-73 Gentlemen:
Enclosed are three signed copies of Annual Report No. 34 for the General Electric Nuclear Test Reactor.
Sincerely, s.7 Q$!?f y G. E. Cunningham Senior Licensing Engineer (510)862-4330
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9404040115 931231 PDR ADOCK 05000073-PDR R
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O GE Nuclear Energy Vallecitos Nuclear Center Pleasanton, California GENERAL ELECTRIC NUCLEAR TEST REACTOR ANNUAL REPORT NO. 34 LICENSE R-33 DOCKET 50-73
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r GENERAL ELECTRIC NUCLEAR TEST REACTOR ANNUAL REPORT NO. 34 l.
INTRODUCTION This report summarizes 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 1,1993, through December 31,1993.
- 11. GENERAL A.
The reactor was operated at or above critical for 521.13 hours1.50463e-4 days <br />0.00361 hours <br />2.149471e-5 weeks <br />4.9465e-6 months <br />; 247 startups were made. Total plant operation equaled 1.428 mwd in 1993, B.
The average radiation exposure to facility personnel was 1.16 Rem.-
C.
There were no scrams or unscheduled shutdowns.
D.
There were no occurrences during 1993 that required notification of the NRC.
E.
There were no notices of violation issued as the result of NRC inspections.
L 111. ORGANIZATION There were no changes to the organization or personnel in the organization during this report period.
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N1R Annual Report No. 34
-L IV. FACILITY CHANGES, TESTS, EXPERIMENTS AND PROCEDURE CHANGES APPROVED BY THE FACILITY MANAGER A.
11cility Changes Pursuant to 10CFR50.59(a), the Facility Manager authorized the following facility changes in 1993, 1.
Primary Outlet Temocrature Meter Descriotion: An old temperature meter and alarm unit for the reactor primary coolant was replaced with a newer model.
Saferv Analvsis: The new instrument is as accurate and responsive as the old one. All functions remained the same. The new instrument was calibrated and functionally checked prior to use.
2.
Core Reel Handle Extension Descriotion: This change authorized the removal of the extension rod on the core reel drive assembly.
Safety Analvsis: This extension rod was not needed at this time and did not serve any purpose. The drive shaft was locked to prevent unintentional movement of the core reel.
3.
Primary Vent Valve
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Description:==
Previously, relocation of a high reactor primary coolant temperature scram test button and a remote primary system vent valve were authorized. This amendment authorized the relocation of the related primary pump control switch, the solenoid vent valve switch and the conductivity meter. These changes will enable operations personnel to remain in lower exposure areas while performing daily tests and inspections.
Saferv Analvsis: Relocating existing equipment has no effect on safety. All equipment will be functionally tested / calibrated prior to reactor operation.
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. NTR Annual Report No. 34 8.
Iesh Pursuant to 10CFR50.59(a), there were no special tests performed during 1993 requiring Facility Manager approval.
C.
Evirriments Pursuant to 10CFR50.59(a), there was one new experiment in 1993 requiring Facility Manager approval.
Reactivity Test Descriotion: A strip of cadmium was placed in a manual poison sheet (MPS) position. Measurements were made to determine the reactivity worth of the remaining MPS and to establish with more certainty the existing core life.
Saferv Analvsis: The present MPS configuration results in less than 764 potential excess reactivity. Any additional cadmium will decrease the potential excess reactivity.
D.
Erncedures Pursuant to 10CFR50.59(a), there were no procedure changes during 1993 requiring Facility Manager approval.
V.
MAJOR PREVENTIVE OR CORRECTIVE MAINTENANCE Major preventive or corrective maintenance activities performed in 1993 are described in Section IV.A., Facility Changes, above.
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NTR Annual Report No. 34 VI. UNSCHEDULED SHUTDOWNS There were no scrams or unscheduled shutdowns during this report period.
Vll. RADIATION LEVELS AND SAMPLE RESULTS i
AT ON-AND OFF-SITE MON!TORING STAllONS The data below are from sample and dosimeter results accumulated during 1993. Except.
for the NTR stack data, these data are for the entire VNC site and include the effects of operations other than the NTR.
l A.
NLR Slack Total airborne releases (stack emissions) for 1993 are as follows.
Alpha Particulate, < 0.11 pCi (predominantly radon-thoron daughter products)
Beta-Gamma Particulate, < 0.61 Ci lodine-131, 9.7 pCi Noble Gases,1.30 x 102 Ci Noble gas activities recorded from the NTR stack integrate both background readings and the actual releases. The background readings may account for 40 to 50% of the indicated release.
B.
Airlionilon (Yearly average of all meteorological stations.)
Four environmental air monitoring' stations are positioned approximately 90 degrees apart around the operating facilities of the site. Each station is equipped with a membrane filter which is changed weekly and analyzed for gross alpha and gross beta-gamma.
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NTR Annual Report No. 34
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B.'
Air _ Monitors (Continued)
Alpha Concentration:
Maximum 3.3 x 10-1.5 pCi/cc
. (predominantly radon-thoron daughter products)
Average 1.1 x 10-15 pCi/cc Beta Concentration:
Maximum 4.2 x 10-14 pCi/cc Average 1.9 x 10-14 pCi/cc
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C.
Gamma.Radiatinn The yearly dose results for the year 1993 as determined from evaluation of site perimeter TLD environmental monitoring dosimeters showed acceptable levels.
D.
hgelation No alpha, beta or gamma activity attributable to activities at the NTR facility was found on or in vegetation in the vicinity of the site.
E.
Water j
There was no release of radioactivity in water or to the ground water greater than those limits specified in 10CFR20, Appendix B, Table 11, Column 2.
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QESite Samples taken off the site indicate normal background for the area.
Vill. RADIATION EXPOSURE The highest annual dose to NTR Operations personnel was 1.29 Rem, and the lowest was 0.93 Rem. The average dose was 1.16 Rem per person.
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y NTR Annual Report No. 34
..j IX. CONCLUSIONS il u
The overall operating experience of the Nuclear Test Reactor reflects another year of safe and efficient operations. There were no reportable events.
GENERAL ELECTRIC COMPANY Vallecitos arid Morris Operations
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N D. R. Smith, Manager Nuclear Test Reactor I
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