ML19351E322

Operation Rept 109 for Jan 1970

ML19351E322
Person / Time
Site:	Yankee Rowe
Issue date:	02/20/1970
From:	YANKEE ATOMIC ELECTRIC CO.
To:
Shared Package
ML19351E321	List: ML19351E320 ML19351E322
References
NUDOCS 8011280110
Download: ML19351E322 (8)

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YANKEE NUCLEAR POWER STATION OPERATION REPORT.NO. 109 i

For the Month of I

i January 1970

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Submitted by YANKEE ATOMIC ELEL.xIC COMPAhT' i

Westboro Massachusetts i

l February 20, 1970 p o sso ie p

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IO; This report covers the: operation'of the Yankee Atomic Electric j.?

! Company at Rove,1Massachuse.tts for the month of January,1970.

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_ During the' period plant load varied between 18h.8 We and 186.0 We.

as-the! circulating water inletitemperature-fluctuated:between h0 F and 36 F.

_ During the report period, the primary,to secondary leak rate in-

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" creased-from 125 and 162 gallons per day. iSurveillance continued to indicate

. the No.1 steam generator:to be the major source of leakage.

l The second Core VIII air charge to-the vapor' container was in progress

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'throuenout the report period. Air' leakage from the vapor container du:ing the i

period'was' normal.

i One shipment'of spent fuel-containing a total of nine assemblies removed during the Core'VII-VIII refueling period, was-made on January 21.

-This fuel: shipment was the 29thJin the series, bringing the number of. assemblies 1

shipped in the ten assembly' cask ;o 271, and the total number of assemblies to date to'287 i

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.During the monthly control rod exercise, rods No. 7 and-No.17

inserted properly but would not withdraw beyond 88 1/8 inches. Since.88 1/8 inches was the new bank position, both control rods No. 7 and No. 17 vere left at this elevation.

Plant Abnormal Occurrences

-There-vere no plant abnormal occurrences during the report period.-

Plant Load Reductions January 7 (1150-1350):

Load reduction to 130 We for monthly turbine l

throttle valve test.

'Januery 9-.(1145-lh00):

Load reduction to 130 W e for isolation of main coolant loop No. h and plugging of gland stem leakoff from Th shutdown cooling outlet valve.

January 31 (1h10-2302):

Load reduction to 130 We for isolation of main-coolant' loop No. 2 and plugging of pressuri::er

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manual-spray valve stem leakoff.

-l Plant Shutdowns There. vere no plant shutdowns.during the month of January,1970.

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-Plant Maintenance The.following is a list of' pertinent maintenance items performed by. the plant. staff 'during the month ofLJanuary,1970.

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1.

The mechanical seal' packing, Land all three plungers were replaced in the No. l' charging pump.

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A valve stem leakoff line loop seal was fabricated for installation dur'ng i

the next scheduled reactor shutdown period.

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3.

The mechanical seal was replaced in_the vaste disposal evaporator No. 2

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distillate pump.

l nstrumentation and Control i

I The following is a list of pertinent instrumentation and control maintenance items perfomed by the plant staff during the month of January, i

1970 1.

A spare sfgnal cable for the underwater television camera was fabricated

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during the; period.

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An operational test was made of the fire detection system.

i Reactor Plant Performance 4

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The follovir.g parameters were determined by means of incore f

instrumentation:

I 585.0 MWt; 525.5 Tavg; Control Rod Group A @ 423", B,C,D @ 88 i

654 ppm boren.

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2.1 Minimum DNER 3.4

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Maximum Outlet Temperature i

592.9

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Secondary Plant Performance l

Feedwater heater terminal differences were as follows:

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No. 1 6.1 F No. 2

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11.6 F No. 3

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5.3 F

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i The Condenser perfomance was as follows:

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185.8 ige; 1.51"Hg. B.P.;

589.6 MWt; bl.4 F C.W. in; TTD = 33.6 F; cleanliness factor = 56.1%.

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Chemistry l

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The main coolant boron concentration was decreased frca 811 ppm j

to 632 ppm during the period to compensate for core depletion.

The average I

mah. coolant pH was 5.46.

l The agin coolant average gross beta-gamma activity and crud level vere 9.92 x 10 ue/ml and 0.02 ppm respectively.

The main coolant tritium concentration decreased from 3.11 ue/ml 8he beginning of the report period to 2.03 uc/ml at the end of the month to makeup and boron dilution water.

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The~ average iodine-131'speelfic activity was 2. 1 x 10 uc/ml and l

e iodine 131/133 atomic ratio was 0.hh indicating the ab ance of detectable j

el defects.

A representative crud sample for the month, collected on January 19, had the following radiochemical analyses: dpm/mg crud.

Cr-51 Mn-54

• -59 g

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3.97 x 10 9 7h x 10 2.60 x 10 l

Co-58 ccA0

1. -110M 5

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5 3.53 x 10 1.18 x 10 1.12 x 10

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A main coolant gas sample collected on January 29 had the following f

radiochemical analyses: ue/cc gas Xe-133 Xe-135 Ar-41

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-1 3.56 x D 1.06 x 10 4.20 x 10 Health and Safety i

One shipment of spent fuel, containing a total activity of 13.9 I

megacuries, was made during the period.

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Waste disposal liquid releases totalled 36,700 dallons containing l

i 0.025 me of gross beta-gamma activity and 1h2 50 curies of tritium. Gaseous f

leases d'. ring the period totalled 1.k62 curies of gross beta-gamma activity d.019 =c of tritium. Secondary plant water discharged totalled 393,993

,, llon. ^ontaiaing 4.388 cc of gross beta-gamma activity and h6.61 curies tf trith..

l Radiation exposure doses for Yankee plant personnel, as measured by film badge, for the month of January,1970 were as follows:

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Average accumulated exposule dose: 73 mrem Maximum accumulated exposure dose: 310 mrem The following is a summary cf all liquids, gases, and solids released, discharged, or shipped from the plant during the year 1969.

Vaste Discosal j

Liquid:

687,298 gallons containing u total beta-gamma j

activity of 0.886 me and 1,048.2 curies of tritium.

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i Gas :

A total beta-gamma activity of 4.131 curies and 9.19 I

curies of tritium.

Airborne Particulate:

A total of 2.51 uc of beta-gamma activity.

SidsforDisposal:

623 drums containing a total activity of 13 33 curies, and six casks containing a total activity of 150.05 curies.

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Secondary Plant and Miscellaneous l

l Liquid:

3,638,855 gallons containing a total beta-gamma l

i activity of 18.34 me and 173.48 curies of tritium.

Fuel Shic_ments During 1969 there were two shipments of spent fuel totaling 18 l

assemblies with a total activity of 44.8 megacuries.

l Operations l

1 Attached is a summary of plant operating statistics and a plot of i

1 daily average load for the month of January,1970.

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Y.\\MU'E d' Ut[C PT."'TRIC C0:R%NY D.t iIX AV! GAGE IDAD for January 1970 0

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YANKEE ATOM!a ELECTRIC COMPAtlY - OfERisTING

SUMMARY

January 1970 MONTH YEAR TO DATE ELECTRICAL O

Gross Generation KWH 137,393,200 137,393,200 10,353,051,700 Sta. Gervice (Wnile Gen. Incl. Lesces)

KWil 8,122,hhh 8,122,4hh 678,127,308 I

KWil 129,270,756 129,270,756 9,67h,924,392 Het Output Station Service 5.91 5.91 6.55 l

Sta. Service (While Hot Gen. Incl. Losses) KWii 0

0 28,907,929 Ave. Gen. For Month KW 184,668 2

Ave. Gen. Running KW 184,668 j

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j PLANT FERFOR}!ANCE i

29.69 29.69 28.42 i

Net Plant Efficiency Net Plant Heat Rate ETu/KWil 11,hg5 11,h95 12,008 I

l Plant Capacity Factor 97 5h 97.54 Th.89 Reactor Plant Availability 5

100.00 100.00 8h.01 f

MONTH COPE VIII TOTAL

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NUCLEAR Hours Critical HRS 7hh 3,129.17 68,948.95 Times Scramned 0

1 59 Burnup i

Ceri Average M4D/hffU 873.19 3,62h.17 Region Average K4D/!CU l

A ("!nER) 727.75 3,279 10 23,210.00 8 (MILLI 2) 1,002.56 4,190.37 16,226.43 C (OUTER) 759 71 3,091.32 3,091.32 D (ZIRCAI/M)

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f /XX XXN; 10 REGION ENRICHMENT A

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