ML19347B291
| ML19347B291 | |
| Person / Time | |
|---|---|
| Site: | National Bureau of Standards Reactor |
| Issue date: | 09/26/1980 |
| From: | Rozier Carter NATIONAL INSTITUTE OF STANDARDS & TECHNOLOGY (FORMERL |
| To: | |
| Shared Package | |
| ML19347B290 | List: |
| References | |
| NUDOCS 8010140220 | |
| Download: ML19347B291 (5) | |
Text
O National Bureau of Standards Reactor Docket #50-184 l
Facility License No. TR-5 I
OPERATIONS REPORT
- - - #29 - - -
January, 1980 - June, 1980 i
This report contains a summary of activities connected with the operations of the NBSR.
It is submitted in fulfillment of section 7.8d of the NBSR Technical Specifications and covers the period from January 1, 1980 to June 30, 1980.
Section numbers in this report (such as, 7.8d(1)) correspond to those used in the Technical Specifications.
September 26, 1980 hcbbl A ku'?vY.
ROBERT S. CARTER Chief, Reactor Radiation Division l
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&O2014 0 2.N l
TABLE OF CONTENTS i
- 7.Sd(l)
Stimmary of Plant Operations l
7.8d(2)
Unscheduled Shutdowns l
7.8d(3)
Tabulation' of Major Items of Plant Maintenance l
7.8d(4)
Tabulation of Major Changes in the Facility and Procedures, i
l and the Test and Experiments, Carried Out without Prior Approval i.
by the U. S. AEC (10CFR 50.59) 7.8d(5)
Summary of. Radioactive Material Released and Results of Environ-mental Surveys Performed 7.8d (6)
Su= mary of Si;;nificant Exposures Received by facility Personnel l
and Visitors T
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i 7.8d(l)
Summary of Plant operations The reactor returned to regular operation at the end of
{ebruary 1980, following replacement of the shim-arm blades.
Details of the blade replacement operations were reported in l
full in the previous semi-annual report. During this period i
January-1, 1980, through June 30, 1980, the reactor was cri-tical for 2539.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and the energy generated was 25011.3 MwH.
7.8d(2).
Unscheduled shutdowns l
Fay 7,1980:
Reactor scram when FRC-3 recorder was with-drawn for maintenance and the connecting cable pulled loose.
Repairs made.
Returned next day because of xenon buildup.
7.8d(3)
Tabulation of Major Items of Plant Maintenance l.
Replaced 3/4" diaphram valve on Outer Plenum Drain (DRV-135).
Old valve had cracked body.
l 2.
Replaced 1/2" diaphram and bonnet in reactor overflow vent valve (DWV-136).
3.
Replaced 2 blades on West Cooling Tower fan (2 blades were found to have cracks.).
4.
Changed storage pool resin.
5.
Changed storage pcol pre-filter elements 3 times, after filter elements once L
(
6.
Replaced storage pool filter elements with activated char-l coal type.
Replaced CO cavity drain lines from bellows in sub-pile room.
2
I 8.
Instal]ed 4 new shims with new bearings in reactor.
9.
Replaced air cylinder on FTV-1 positive lock.
10.
Repacked bearings on #1 lbin D 0 pump motor as a P.M. and 2
j placed it on #3 lbin D 0 pump.
2 j
11.
_ Replaced seals and hoses on fuel transfer telescopic cylinder and positioning cylinder.
12.
Cleaned cooling tower basin.
l 13.
Completed scheduled preventative maintenance for this period.
1 i
14.
Engineering changes to the facility during this period:
ECN-237 Replaced 2" drain system in Process Room with new certified welded system.
ECN-238 Installed split-ring spacer on CO bellows around 2
reactor inlet p'ipin6 in the Sub-pile Room to allow inspection inside the bellows.
15.
Instrument Procedures Performed FRC-3 Outer Plenum Flow I
FRC-4 Inner Plenum Flow F1-19 Emergency Exhaust Flow I
i K-103 Relay Scram System l
NC-4 Intermediate Range (Log N)
NC-7 Power Level NC-8 Power Level NC-9 Nuclear Safety System PI-10 Reacter Building Pressure i
SPS-150 Emerg. Standley Fan Controller l
RM1-1 thru 10 Reactor Area Monitors RM3-1 Secondary Coolant Monitor
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l RM3-2 Helium Sweep. Gas Monitor l
l EM3-4 Irradiated Air Radiation Monitor RM4-1 Stack Air Radiation Monitor l
TIA-40A & B Reactor Differential Temperature Instrument Maintenance Performed:
16.
Replaced K-ll4 (major scram) relays 17.
Replaced N16 GM Tube (RM3-1) 18.
Replaced 07-41 card and checked out NC-7 19.
Replaced FRC-3 recorder j
7.8d(4)
Tabulation of Major Changes in the Facility and Procedures, and the Test and Experime ts, Carried Out Without Prior Approval by the U. S. AEC (10 CFR 50.59) i None this reporting period 7.8d(5)
Summary of Radioactive Material Released and Results of Environmental Surveys Performed.
Three hundred sixty-six (366) curies of tritium and 262 i
curies of Argon-41 were released as gaseous waste, while 346 millicuries of. tritium and 561 microcuries of other 8-y -
emitters were released into the sanitary sewer.
Environmental, samples of the streams, wells, vegetation and/or soil, and air showed no significant changes.
7.8d(6)
Summary of Significant Exposures Received by Facility Personnel j
i and Visitors 1.
No significant exposures were received by any visitors.
2.
One person at the facility had a significant exposure of i
700 Mrem for this period.
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