ML20085H356
| ML20085H356 | |
| Person / Time | |
|---|---|
| Site: | Saxton File:GPU Nuclear icon.png |
| Issue date: | 11/30/1964 |
| From: | SAXTON NUCLEAR EXPERIMENTAL CORP. |
| To: | |
| Shared Package | |
| ML20083L048 | List:
|
| References | |
| FOIA-91-17 NUDOCS 9110280247 | |
| Download: ML20085H356 (7) | |
Text
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- s. s SAXTON NUCLEAR EXPERIMENTAL CORPORATION Operation Renort for Nove.ber 1064
- 1. REACTOR OPERATIONS At the beginning of this report period the reactor was being operated at a power leel of 20 Wt in preparation for cynthetic crud test. On Nov mber 2nd and 3nd the , oron concentration in the main ant was reduced to less than 5 ppm. On November 5th load rejection tests fre c ' nel of 15 Wt were conducted for the purpose of cetemining the response - v' iner to system te=perature transients.
U on completion of the load rejection o < wr was manually scrammed and crud e(OH)2 was added to .he main coolan, purpose of verifying the injectio]nrateandsaCingandanalysis ' , reactor was made critical and was loaded to 20 Wt a . 9:p on Nove=bei With the reactor plant operating at
r x was added to the main coolant system on Novmber 9th nnd again on November lux. At 4e capletion of the addition on November 10th a total of 458 grams of magnetite (Fe30 4) h.c.d been added. On November lith the reacto* power level une reduced to 10 Wt. Boric acid was added to the main coolant on November 13th to ra se tne boron concentration to 478 ppm. On November 16th the reactor power level was returned to 20 Wt.
Operation at 20 Wt continued until November 18th when the power level was raised to 23.5 Wt. On November 20th the power level was decreased to 10 Wt and then on November 23rd it was returned to 20 Wt.
On November 24th trouble was experienced with channel "B" power range nuclear v instrumentation. A resistance check showed that the trouble was in the detector cables inside the containment vessel. The decision was made to shut the reactor down and enter the containment vessel. The cable trouble was located in a junction box which is common
! to all nuclear instrumentation cables. Excessive moisture had accumulated on and inside the cable connectors after one of the heaters in the junction box had failed.
On November 25tn the decision was made to cool the main coolant system down and remove the center and one peripheral 3x3 fuel subassemblies frem the reactor vessel and inspect them with the underwater periscope for crud deposition.
Reactor plant en idown was completed on November 27th. Tne plant remained in a colc shutdown conditien curing the remainder of the month.
- 2. EIPEREENTAL PROGRAM Rod worth measurc..:nts at power were made for control rods #5 and #2 as the main coolant boron concentrauon was reduced from 525 ppm to 3 p;m.
Measurements were made to detemine the pressurizer response to systen temperure transients which were introduced by tripping the generator "off the line" with tne reactor load at 15 Wt.
The syntnetic crud test was initiated on November 5th. Crud injections were stopped after 458 grams of Fe304 had been added to the main coolant system. The apparent reactivity loss associated with the crud addition indicated that sufficient v crud hac been deposited on the core to establish the desired conditions for a boron nideout test. Boron was added to the main coolant while the reactor was operating at 10 Dh, a non-nucleate boiling condition. There was no change in unexplained reactivity detected when the power level was increased ,to 20 Wt and then to 23.5 Wt.
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During the month flux wire irradiations, noise measurements, and pile oscillator tests were performed in connection with the crud test.
- 3. OPEPATI!G TESTS On November 18th the radiation monitoring systen circuits were tested.
A normal test of the safety injection bystem was conducted on November 19th.
- 4. PAINTENANCE
- The principal items of mechanical maintenance for the month included the preparation of the reactor vessel head for the removal of two 3x3 fuel subassemblies for inspection; installing new bearings on the a'DF control room supply air handler; renairing the steam coils on the PMDF supply air handler for the concentrates handling er a; replacing the pre-filters on the C&A Building air intake; instalhng a new valve in the service water Hne in the decontamination roori; tervicing the tow motor that is used for handling 55 gallon drums in the L'DF; installing a funnul and drain for the steam generator blowdown vent; replacing the gasket on a steam trap on the main steam hcer; installing new fittings on a hydrogen sample bomb; processing nine drums of liC F evaporator concentrates; remounting the ey,e wash fountain foot pedal in the chemistry laboratory; cleaning and lapping the seat of the RWDF gas stripper cooling water relief valve; installing new belts on the control rod drive mechanism roor air handler; installing a new section of pipe in the &'DF auxiliary steam system condensate g return line; and replacing the fan belt on tlie containment vessel auxiliary compartment, air handler.
The major items of electrical maintenance included the instanation of a recorder in the control room for recording the 6T across the core center fuel subassenbly; calibrating the steam generator pressure transmitter; repairing the recorder in the E'DF hydrogen analyzer; repairing a solenoid operated valve on the steam generator blowdown cample collecting tank; installing pemanent high radiation area alarm lights at the personnel entrances to the containment vessel; cleaning and drying nuclear 1
detector cable connectors; replacing a defective heater element in the junction box for l the nuclear detector cables; installing and checking the plateau on a new BF 3 in source range nuclear anstrumentation channel B; neggering all nuclear instrumentation detector cables; replacing the G.M. tubes in the sample room radiation monitor; repairing the count room alpha scaler; resetting the temperature controller for the shutdown cooling system heat exchanger component cooling water control valve; and reconnecting a remote indicator en ue R?IDF control panel to read stack effluent radioactivity.
- 5. PIJST 'HANGES
!s cne-inen carben steel pipe line was installed fract the monitor tanks to the suctioc. ;? the L'0F discharge tanks pump. The new line provides a means for drain 2ng tne monitor tanks via the same piping system as is used to drain the discharge tanks.
( 6. CHDCSTRY l
i u During the early part of this report period the boron ami potassium concentrations in the min ecolant were reduced to less than 5 p;c and 0.1 ppo respectively in preparaQn fer the synthetic crud test.
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7.e it.ttial crud ad ition of 66.6 grams of Fe30 , as4 Fe(OH)2, was made on Noveaber Su , with the reacter at zero power. Subsequent crud additions were made with the reactor operating at a power level of 20 Edt on Novmber 9th and 10th. A total of 458 grams of Fe30; were added to the main coolant. The maximum level of crud that was detected at any time durin;; crud injection was 1.86 pp=. Approximately 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> after the final crud injection the crud level in the main coolant had dropped to 0.07 p;n.
A su=ary of the main coolant chemistry analyses made during the month are contained in the followir.g table:
Main Coo: tnt System F nimum i Maximum Conducti<ity, umhos 1,29 15.o Eeron, ppm 3 525 Fotassium, ppm 0.04 1.58 Lithium, ppb 8 125 Chlorides, p;n .010 .065 itdrogen, e c/Kg H 2O < 5 (*) 70 0xygen, ppm 4.005 4.005 Crud, ppm .053 2.8 (**)
Activity,ue/cc 0.197 1.355
(*) Reactor in cold shutdown condition
(**) Crud burst when MC pump was restarted during plant cocidown Except for a short period after secondary system startup on Novmber 5th the chlorides in ,e steam generator were maintained below 0.240 ppm. The ave = age actr<ity of th oteam generator blowdown during the month was less than 1 x 104 ue/cc.
- 7. P.AD!ATION AND WASTE DISPOSAL Radiation surveying consisted of routine plant site surveys, EdDF, waste drums for storage and snipment, sample shipment, and truck after loading of radioactive waste crums. The following maximum readings were taken:
L, cation Radiation Reading
, h*DF l
Evaporator (under bottom) 200 mres/hr beta-gamma Evaporator (centact outside upper level) 40 mrm/hr beta-gama Waste Drum (for storage - contact) 90 mrem /hr beta-gamma Waste Drum (for storage - meter) 6 nr m/hr beta-gam =a Drum StoraEe Area (at HRA fence) 9.5 mrem /hr beta-gamma C&A Buildinn Waste Drum (baling machine - contact) 9 mrm/hr beta-gann,n Sample Storage Drum (contact) 16 mrm/hr beta-gamma Sample Room (at door of panel) 10 mrem /hrbeta-gazzra v Cnarging Pump (contact with chamber) l 80 mrem /hr beta-gamma Chem lab Hot Sink (l" from drain) 9.0 mrm/hr beta-gama
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M . Ter at;on Rep: L f or r... er 19u, ._ . . 4 g-ution Radiation Readinn M s e ellaneous C.V. Exhaust Air Handler (contact filters - inside) 6.0 mrem /hr beta-ga=a C.V. F.xnaust Air Handler (contact filters - outside)2.0 mrem /hr beta-gama Fence (closest point to C.V. exhaust air handler) 0.6 mrem /hr beta-gamma C.V. (1 Hour after shutdown on 11-4-64)
Primary Compartment (C pump volute) 155 mrm/hr beta-gamma Primary Compartment (steam generator - top) 10 mrem /hr beta-gamma Pr:. mary Compartment (steam generator - bottom) 50 mrem /hr beta-g -
Pr_u ry Compartment (pressurizer - top) 110 mrem /hr beta-gema Prmary Compartment (pressurizer - bottom) 70 mrem /nr beta-gama Primary Compartment (general upper level) 40 mrem /hr beta-gn=a Primary Ccmpartment (regenerative B) 160 mrem /nr beta-gama Primarf Compartment (non-regenerative E) 110 mram/hr beta-gam a Primary Ccapartment (general lower level) 50 mre/hr beta-gama Auxiliary Compartment (shutdown cooling E) 65 mres/nr beta-samma Auxiliary Compartment (discharge tank - top) 23 mrm/hr beta-gama Auxiliary Compartment (discharge tank - bottom) 50 mrem /hr beta-gamma Filter Vault (at decr) 6 mrem /nr beta-ga=a Contrcl Red Drive Rocm (ams reach up drive mech.) 45 mrem /nr beta-gama v -
C.V. (12 Hours after Snutdown on 11-24-64)
Primary Compartment (MC pump volute) 70 mrem /hr beta-gam a Primarf Compar=e t (steam generator - bottcc) 38 mrm/hr beta-gama Primary Compartment (pressurizer - top) 100 mrm/nr beta-ga=a Primary Compartment (pressurizer - bottom) 36 mrem /hr beta-gamma Pri-ary Cc= par ment (general upper level) 24 mrem /hr beta-ga=a Pr.ma y Compartment (regenerative E) 90 mrem /hr beta-gamma Primary Compartment (non-regenerative E) 70 mram/hr beta-gama Pr.ma y Comparment (general lower level) 48 mrem /n- beta-gn=a Auxi:2.ary Compartment (discharge tank - top) 15 = rem /hr beta-ga=a Auxiliary Compartment (discharge tank - bottom) 38 mrem /hr beta-ga m a Auxiliary Compartment (shutdown cooung E) 35 mrem /hr beta-gamma Rea-tor De n (contact grating) 1A0 tre/hr beta-ga::mia Rea: tor Deck (at instrument penetrations) 90 mrem /hr beta-ga= a Cc .tamination surveying consisted of routine plant site surveys, surveys of a petion cf the C.V. during shutdown, toole, waste drums, and a shipment of racioactive materii-. ?.e clean and centrolled areas were generally within the " Clean Area" limits w$ e .nt caption of pemanent exclusion areas. All areas were cleaned periodically t: r_ rv ze the amount of smearable contamination. The following contamination rea:.ings wer+ taken:
locatic7 Contamination Readings s C.V. (Pric: to Flooding of Storage Well)
Operating Deck 2780 d/m/ smear beta-ga=ma Brid a 7250 d/m/ smear beta-ga ma i
Reactor Deck l K 53700 d/m/ smear beta-gama
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Lie s . _ . _ . . N5 liquid and gaseous effluents from the SNEC site for the month of November were at follows:
(Curie) (Curie) (Ourie)
Activity Activity Effluent Type Activity Tnis Month Year to Date latt Twelve Months Liquid 0.000372 0.019977 0.019977 Air, Xe 14.881245 31.602880 31.602880 Air, I-131 0.000172 (*) 0.000274 (*) 0.000274(*)
Air, M.F.P. 0.148812 37.700874 37.700874
(*) Minimum instrument sensitivity N!neshipped of waste were barrels from of waste were drumed for te:porary storage and twenty barrels the site.
Radiation exposures for all personnel as measured by film badges for the morr.h of October,1964, were a maximum of 520 mrom with an average of 67 mram.
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SAXT0tl '."JCLEAR EXPERIMENTAL CORPORATION OPERATING STATISTICS MONTH Nove:aber yyan 1964 NUC LFAR UNIT MONTH YEAR TO DATE TDE CRITICAL NO. 1 31 268 HOURS CRITICAL HRS. 564.20 3,832.08 10,572.04 TDES SCRAMMED (MANUAL) No. 1 25 208
- TDE SCRAMMED (INADVERTANT) .N O. 0 6 25 THERMAL POWER OENERATION MWH 9,014.19 71,U5.17 171,.U6.65 AVERAGE BJRNUP MWDA(TV 431.38 3,037 21 7,709 18 CONTROL R0D PGITIOt3 AT D;D OF MONTH AT QUILIBRIUM POWER OF 0 HWt MAIN C001 ANT BORON AL6 PPM RODS OUT - INCIES NO. 1 NO. 2 NO. 3 NO. 4 -
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s EIICTRTCAL UNIT MONTH YEAR TO DATE GRCSS GEGRATION MWH 1,352 11,903 28,673 STATIOX SERVICE MWH 208.53 2,062 30 6,333.57 STATION SERVICE % 15.42 17.33 22.09 AVG. PUST EFFICIENCY - 5.H(e)/MWH(t) % 15.00 16. 73 16.75 ATG. GEERATION RJNNING ( 561.% HRS) KW 2,407.66 3,425.30 3,346.06 PIANT If.=.D FACTOR -
(AVC. LEX. FOR MONTH / FAX. IDAD) % 44.00 30.80 27.34 AUXILIA3" STEAM SUPPLY - NUCLEAR STE/R ST??2ED BY REACTOR ERS. 562.75 3,492.87 8,618.57 RWDF EVA? ORATOR OPERATION HRS. 131.75 746.90 1,690.55
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