ML20085H212

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Monthly Operating Rept for Jul 1966 for Saxton Nuclear Experimental Corp
ML20085H212
Person / Time
Site: Saxton File:GPU Nuclear icon.png
Issue date: 07/31/1966
From:
SAXTON NUCLEAR EXPERIMENTAL CORP.
To:
Shared Package
ML20083L048 List: ... further results
References
FOIA-91-17 NUDOCS 9110280170
Download: ML20085H212 (7)
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OSemtienn Renort for Jal" J Wi

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.. 2., r. u 7. f. 7. 3i sy. c s A ceries of low power physics tests that was begun on June 29tr. was comp.lete:

at 10:30 /d! on July 1st. Start-up of the secondary cystem wns rennenced :enediats.ly and at 1:50 rT the reactor was operat$ ng at full licensed power 23. 5 !".h .

Operation at 23.5 IUt was continued until the norning cf Jely 2:- d wr.&n a scheduled shutdown of the secondary system was initiated. Reacter crerat::n at escentially cero power continued until 9:54 AM when the reacter scram.med due to aew voltage output of the variable frequency motor-generator set whieb was the act.r: ( ef Tcuer for the main coolant pump at the time. The reactor remained in a t ot shata:e condition until the norning of July 23rd when a start-up for training wst cenmented.

The start-up was teminated by a manual shutdown when nuclear power rar.g: cnonnel 3 f ailed . On lu2y 24th the reactor was operated for personnel training and fcr I.cw power physics ter.ts. Upon completion of the physics test the rea:tc r t.as tar.uill,,

e hut d cw; ar.d :ccidown of the unin coolant system was initiat ed tc cenuence i. tenest.ltd plant eutage.

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%c period July 26th through Jul;' 31st was prh%rily devcted t: prep r.ing 11 r 2.3 ' ncucting a contairc.cnt vessel leak rate test at a t e 5 *. pressurc c f D png, 3 TJCU: TAI PROGPJJi The tenperature coefficient as detemined from neasurcue:. f raau e at Icu power at the beginning of the month was 0.03% 4k/k per degree Farenheit at ti, ppm boron and 530 F average nain coolant temperature.

On July 24th uith the reactor operating at ecaentially rere rceer and the main ecchnt average tenperature at 530oF, the just critical boren con:entreticn fer the cortre2 rod configuration, rod d2 at 4 55 inches and red: '. , 3 3 m '

' at .C nches. ur.s det emined to be So3 ppn at low nain coolant pH. The boron ccncentrat:cr-deterninca for the nane conditions except for high main coolant pH during the preced:ng eht.tdown was 1066 ppn. Also on July 24th an all rods out Nr* cr nicai main coolant boron con cntration was nade after a xenon decay peried o. '" r.curi.

The boron cencontration for these conditions was 1465 ppm.

L. _0PEPJ.TIO!D L TESTS On July 15th a nomal test of the safety injection system was conducted.

t l The radiation monitoring system circuits were tested on Jub 3ra.

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SNEC Operations Report for July 1966 . . . . . . . #2

5. BAI!!TENANCE l

ihe principal items of uechanical maintenance fer the month included replacing four rings of packing on each of plungers Hos.1 & 2 of charging pump No.1; processing three drums of RWDF evaporator bottoms; replacing the fittings on the hign pressure main coolant sample container; installing a new seat in the shut-off valve in the service water line to the sewage plant; installirq s 120 inch manameter for a containment vessel leak rate test; cleaning the RWDF evaporator hotwell solenoid operated dump valve; repairing a leak in the chemistqr lab sink; installing new sheaves and belts on the stack fan; replacing the cartridges in the filter in the boric acid recirculation line; cleaning and painting the yard area sump pump; greasing and lubricating the charging pumps; flushing the drain line from the RUDF gas compressor manifold to the RWDF sump; cleaning the check valve in the discharge line of the RUDF eump pump; preparing the reactor vessel head for making fuel subassembly changes; and preparing the containment vessel for a leak rate test.

The major items of electrical and instrument maintenance included repairing the chart speed adjustment on the nuclear instrwmentation power range recorder; calibrating the computer-indicator for radiation monitoring chinnel RIC-6; repairing the pulse height analyzer in the count room; making up a spare '- of detector cables for a nuclear instrumentation intermediate range channel; replaci..g the ion chm:ber in nuclear instrumentation power range channel B; leak testing the manometer installed for a containnent vessel leak rate test, installing four resistance thermometers in the containment vessel; leak testing all containment vessel penetrations; replacing the air regulator on the containment vessel pressure transmitter; repairing the filter paper drive in site monitor RIC-9; and repairing the liquid scintillation counter it.

the count room.

6. CIGIISTnY The main coolant system chenistry was maintained for power operating conditions until July 25th. On July 15th the lithium was removed by demineralization to establish a low pH condition which was maintained for the remainder of the power run. On Ju3y 25th the hydrogen concentration was reduced to less than 5 cc/kg H2O in preparation for opening the main coolant system.

The degassed main coolant 15 minute beta-gamma activity increased from .-

0.714 uc/cc before start-up on July let to 5 22 ue/cc eight hours after bestnning-power operation. The activity remained at or above the latter values until July 15 when month.

domineralization reduced it to less-than 3.00 ue/cc for the remainder of the A summary of the analyses made on main coolant samples taken during the month is given in the following table:

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l SNLC Operations Report for M y 3966 . . . . . . . d3 1

i CH mISTRY (Continued) p in Coolant System Kininum Maxleum pH at 25 0 5.13 6.23 Conductivity, unhos 2.44 6.88 Boron, p;n 621 1317 Chlorides, p;n 4 0.005 4 0.005 Lithium, ppn c 0.01 0.56 Oxygen, ppm 4 0.005 40.005 Hydrogen, cc/kg 4.0 49.0 Crud, ppb 17.6 61 "

Gross Beta Gamma (15 mir. decassed) uc/cc .714 c.64 r J Except for a short period after start-up on July let the steam generater chlorides were maintained less than 0.150 ppm. The activity of the steam generator blowdown averaged less than 1 x 10-8 uc/cc during the month, f

7. RADIATIO!! id:D WASTE DISPOSAL Padiation surveying consisted of routine plant surveys, C.V. durirc shutdown and materials shipments. The following maximum radiation readings were taken Inention Radiation Readinn Cid Buildinc Uaste Drum (baling machine) 19.0 mrem /hr beta-gamma Charging Pump (contact with chamber) 33.0 mrem /hr beta-gn=a Sample Room (door of sample panel) 5.0 mrem /hr beta-ga=.a Chemical Inb Hot Sink (l" from drain) 17 5 mrem /hr beta-gamma iclDF l

t Evaporator (under bottom) 300 mrem /hr beta-ga:ma l Evaporator (contact outside upper level) 10 nrem/hr beta-gamma Drum Storage Area (at HRA fence) 2 5 mrem /hr beta-gn=.a C.V. (70 hours8.101852e-4 days <br />0.0194 hours <br />1.157407e-4 weeks <br />2.6635e-5 months <br /> after shutdown)

Primary Compartment (general upper icvel) 31mre/hrbeta-gamma Primary Compartment (contact M.C. 180 crem/hr beta gamma Primary Compartment (S.G. bottcm) pump volu%' 50 mrem /hr beta-gamma Primaq Compartment (preocurizer bottom) 60 mrem /hrbeta-gamma Primary Compartment (general lower level) 23 mrem /hr beta-gamma Primary Compartment (regen. HX) 200 mren/hr beta-ga =a Primary Compartment (non-regen. HX) 50 mrem /hrbeta-garza l

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SNEC Operations Report for July 1966 . . . . . . #4 4

RADIATION AUD WASTE DISPOSAI. (Continued)

Ioention Rad $ation Readinr.

C.V. (70 hours8.101852e-4 days <br />0.0194 hours <br />1.157407e-4 weeks <br />2.6635e-5 months <br /> after shutdown) '

Aux. Equip. Compartment (S.C.H.X.2 15 mrm/hr beta-gama Aux. Equip. Compartment (D.T. top) 22 mrem /hr beta-gamma Aux. Equip. Compartment (D.T. bottom) 35 mrm/hr beta-gamma Aux. Equip. Compartment (general lower level) 10 mrem /hr beta-ga:un Reactor Deck water level at grating) after 74 hrs. 45 mrem /hr beta-gamma Reactor Deck instrument ports) 140 mrem /hr beta-gama Reactor Deck waist level) 14 mrem /hr beta-gamma-Reactor Deck '(storage well railing) 15 nrm /hrbeta-gamma '

hiscellaneous l 1 shipment of samples 35 mrem /hr beta-gamma 1 detector (nuclear instrumentation) shipment 0 7 mrm/hr beta-gama Contamination surveysing consisted of routine plant site surveys, surveys of materbia nhinned, tools, equipnent and C.V. during shutdown. The clean aret, were-within.the " Clean Area" limits. The controlled areas were generally.within the

" Clean Area" limits. The controlled areas were cleaned frequenth to keep ard/or to return it to the " Clean Area" limits. The exclusion areas were cleaned periodically to minimize the amount of amcarable contardnation. The following contamination levels were observed -

.I.o. .ga.Lt.1.o, D Contamination Readinn C&A Building-Charging Pump Chamber --4.48x105 d /smearbeta-gamma Charging Pamp Chamber 410 d smear alpha Charging Room Floor 8050 d smear beta-gama Sample Room Sink 4230 d smear beta-gama Sample Roan Sink 4.10 d smear alpha Sample Room Floor smear beta-gama 1319d Chemical lab Hot Sink 4.930x100 d / smear beta-gama Chemical IAb Hot Sink 410 d ./smearalpha RWDF Pump Room' Floor 3930 d/m/ smear beta-gama Shipping Room Floor -285 d/m/ smear beta-gama l

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SNEC Operations Report for July 1966 . . . . . . . #5 RADIATION AND WASTE DISPOSAL (Continued) liquid and gaseous effluente from the SNEC site for the month of July 1966 were as follows:

(Curie) (Curie) (Curie) -

Effluent Activity Activity Activity

_ Type This Month Year to Date IAst Twelve Months Tritium 7.470819 12.659266 20,831713 Liquid 0.001355 0.009203 0.012170 Air, Xe 40.607825 82.151416 100.988251 Air, I-131 0.001808 0.049419 0.056593 Air, P..F.P. 0.406078 0.821514 1.009883 Three barrels of waste were drummed for temporary storage. No drums were shipped from the site.

Radiation exposure for all SNEC personnel as measured by film badges for the month of June 1966 were a maximum of 770 mrem with an average of 29.9 mrem.

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I SAXTON NUCLEAR EXPERDIENTAL CORPORATION C ERATINO STATISTICS HONTH __ _ JULY YEAR 1966 ,

NUC LEAR UNIT Hgj_TH T YEAR TO DATE TIME CRITICAL NO. 1 17 472 HOURS CRITICAL HRS. 513.88 4,016.78 16,897 91 TIMES SCRAMMED (MANUAL) NO. 2 17 2'i9 NO. 0 1 30

  • TIME QCRAMMED (INADVERTANT)

THERMAL POWER GENERATION MWH n ,699 11 86,624 19 295,874.01 AVERAGE BJRNUP (Pu Region) WDMTV 954.96 7,070.87 7,132.59 CONTROL ROD POSITIONS AT llND OF MONTH AT EUILIBRIUM POWER OF -0 MWt MAIN 000lkiT BORON 1224 PPH RODS OUT - INCHES NO. 1 0 No. 2 0 NO. 3 0 0 0 No. 6 0 NO. 4 NO. 5 ELECTRICAL UNIT HONTH YEAR TO DATE

' GROSS DENERATION - MWH 1,849.00 15,116.00 49,398.00 STATION SERVICE MWH 212.35 1,53?.43 9,735 72 STATION SERVICE  % 11.48 10.14 19.20 15.80 17.45 ~16.70 AVO.PIANTEFFICIENCY-HWH(e)/HWH(t)  %

AVO. GENERATION RUNNING ( 499.18 HRS) KW 3,704.07 -3,932.90_ 3,240.03 PIANT IDAD FACTOR -

! (AVO. GEN. FOR MONTH / MAX. LOAD)  % 56.23 67.22 29.66 AUXILIARY STEAM SUPPLY - NUCLEAR STEAM SUPPLIED BY REACTOR HES . 500.18 3,889.58 13,588.55 i

RWDF EVAPORATOR OPERATION RRS. 276.00 1,11.8.27 3,209.52-l j

  • RD1 ARKS:

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