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I. INTRODUCTION

This report discusses and summarizes the radioactivedischarges from both Unit I and II of Donald C. Cook NuclearPlant during the first six months of calendar year 1978. Theformat presented in Section 5.4.lB of " Appendix B TechnicalSpecifications"

for the aforementioned units has been followed in-

preparing this document.

Unit I started 1978 operating at 100% power. On January17,the unit was shutdown from 100% due to high conductivity in

steam generators caused by acid getting into the condensate sys-.tem while regenerating resin in the make-up plant. Unit I wasreturned to service on January 19, 1978. During the month ofFebruary, Unit I operated in the deicing mode, and for a period of

7.5 hours lost reserve power when an itsulator flashed over and ,tripped breakers causing an unscheduled outage. -No other majorunscheduled outages occurred.

On April 6, 1978 during this reporting period, Unit I .was removed from service to conduct the Cycle II/III Refueling -Outage. This outage began on April 7th, and the unit was returnedto full service on June 24, 1978.

issued on December 23,The Unit II Facility Operating License, No. DPR-74, was.

1977. Initial fuel loading commenced onDecember 26 and was completed on January 2, 1978. Post core loadingtests were conducted throughout the month of February and initialcriticality was achieved on March 10, 1978, after which the turbine / -generator system was paralleled to the system on the same date.

On " arch 29, the Unit was made suberitical. Investi-gation of condenser vacuum problems revealed failed tubes in "A"-

condensers. Damage was caused by steam impingement from steamdump valves. In preparation for a unit start-up, the steam leads -were pressurized. This outage continued until April 1, 1978.On April 19th, the Unit was once again removed fromservice. Cold shutdown was brought about for various maintenance .and modification work.

the end of the month. Unit II remained out of service until the.

Another unplanned outage started ?!ay 19, 1978 due toan unidentified reactor coolant system leakage in excess of 1 gpm.

.

It was found that the failed fuel detector safety valve was leak-ing. Isolating the fuel detector reduced the leakage from 3.26gpm to .158 gpm. The unit was then kept out of service to perform n

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moisture separator reheater modifications and remained as such (until June 1, 1978.|!

The next major forced outage occurred in the month of IJune, after severa,1 reoccurring low vacuum trips due to an im-pulse pressure effect on the low vacuum trip devices from analternate drain line discharging on the immediate vicinity ofthe condenser vacuum sensing lines. The sensing valves were re- -located to the opposite side of the condenser. Following theoutage for moist ure separator reheater modifications, power ,ascension testing continued and the unit attained 97% power.

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II. RADIOACTIVE RELEASES

from both Units I and II have been handled as joint responsesThe details and data concerning radioactive dischargesrather than independently for the first six months of 1978.

' Appendix A presents this information in accordance with thcited in Section 5.41of Appendix B, Environmental Technical Speci-e format

,

fication. As in reports preceeding this one,well within the limits set forth in Appendix B Environmental Techthe effluents wereSpecification for the D.C. Cook Nuclear Plantto 10 CFR Part 50. and Appendix I

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APPEttDIX A-

RADI0 ACTIVE RELEASE DATA .

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EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT 1978

LIQUID EFFLUENTS

.

BATCH MODE

Nuclides Released Unit 1_st Quarter _. ... ._. 2nd Quarter

Stronium - 89 Ci

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EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT - 1978

LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES

Est. TotalUnit. 1st Quarter 2nd Quarter Error, %

FISSION AND ACTIVATION PRODUCTS.

Total release (not includingtritium, gases, alpha) Ci 4.443 E-1 5.028 E-1 3.03

Average diluted concentrationduring period pCi/ml 2.359 E-8 2.017 E-8

Percent of aoolicable limit % .338 .148.

TRITIUM.

Total release Ci 84.279 208.659 .260.Average diluted concentration.

during period pCi/ml 1.182 E-6 2.212 E-6 -Percent of acolicable limit %

~

.039 .074.

DISSOLVED AND ENTRAINED GASES.

Total release Ci 6.882 E-1 1.794 E-2.Average diluted concentration -.

during period 'uCi/ml 3.654 E-8 7.198 E-10..Percent of aoolicable limit % * *t

._ GROSS ALPHA RADIOACTIVITY'

Total release Ci

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EFFLUENT AND WASTE DISPOSAL SElilANNUAL REPDRT - 1978

GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES

.

_

Eh t 1Units 1st ws N

FISSION AND ACTIVATION GASES

Total release Ci 9.986 E 3 2.520 E 2 1.4Average release rate for period u'C'i /Sec 1.284 E 3 3.205 E 1Percent of technical specification

~

limit % 6.15 0.19

_ 10 DINES-

Total iodine - 131 Ci 2.964 E-4 9.846 E-3 13.9.Average release rate for period ufi/Sec 3.812 E-5 1.25 E-3.Percent of technical specification.

_ limit : 0.007 .225

t_PARTICULATES

Particulates with half-lives > 8 days Ci

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EFFLUENT AND WASTE DISPOSAL SEMIANNUAL RC90RT - 1978

GASEOUS EFFLUENTS - ELEVATED Rr. LEASE

CONTINUOUS MODE BATCH MODE

'

Nuclides Released Uni t Ist Quarter 2 rd Quarter 1st Quarter 2rd O e s_

_

FISSION GASES-

Krypton - 85 Ci 6.979 E 1 5.462 E 1: Krypton - 85m Ci 7.430 E-1 7.042 E-1

-

; Krypton - 87 Ci 1.221 E-1! Krypton - 88 Ci 1.364 E Oj Xenon - 133 Ci 4.173 E 2 7.340 E1 9.384 E 3 1.156 E 2(Xenon - 135 Ci 4.009 E O 3.671 E 1 5.439 E O; Xenon - 135m Ci: Xenon - 138 Ci

{ Xenon - 133m Ci7.388 E 1 7.141 E-1

1-

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Total for Deniod Ci 4.213 E 2 7.340 E1 9.565 E3 1.786 E 2.i4 .IIODINES

Iodine - 131 Ci 2.122 E-4 7.850 E-4 8.424 E-5 9.061 E-3 .' Iodine - 133 Ci 2.664 E-5 1.387 E-5 1.033 E-5-Iodine - 135 Ci

h:htal for oeriod Ci 2.389 E-4 7.989 E-4 8.424 E-5 9.071 E-3

fPARTICULATES.

1Stratium - 89 Ci 'rStratium - 90 CiI,Cesium - 134 Ci 8.621 E-10Msium-137 Ci 5.316 E-6*

,

Iarium-lanthanum - 140 Cifobalt-58 Ci 4.596 E-6 4.325 E-2balt - 60 Ci 1.505 E-5 4.087 E-2

[teshm -138_ l.706 E-6 3.196 E-4( m - 54

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2.023 E-3 .m - 31 4.883 E-3,( 'N - 95 8.010 E-5.

-1 15 78 184 :NE E $m - 88 2.137 E-2+

A-4.

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EFFLUENT Af4D WASTE DISPOSAL SEMIANilUAL REPORT - 1978

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS -

A. Solid waste shipped offsite for burial or disposal . -

.

1. Type of waste Unit 6-month Est. Total,period Error, %

3 6.113 E 2 1, a. Spent resins, filter sludges, m

evaporator bottoms, etc. Ci 1.398 E 2 4.

3b. Dry compressible waste, contaminated m 2.031 E 2 1equipment, etc. Ci 2.026 E 1 200

3c. Irradiated components, control rods, metc. Ci _.

d. Other m3 ,4 Ci __

.

2. Estimate of major nuclide composition

a. CS-137 % 55.5.,a CS-134 % 40.4+ CO-58 & 60 % 4.0

) b. 00-60 % 85.0) 00-58 % 15.0 __g

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3. Solid Waste Disposition

~ Number of Shioments Mode of Transoortation Destination1

M Sheffield, Ill'

M Bannell, S. C.

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EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT - 1978

MDA GASEOUS EFFLUENTS - ELEVATED RELEASE

4

CONTINUOUS MODE 8ATCH MODE

~

Nuclides Released Unit ist Quarter 2nd Quarter i1st Guarter 2nd Quarte,r ,_

FISSION GASES

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RADIOACTIVE EFFLUENT RELEASE REPORT

INDIANA & MICHIGAN POWER COMPANYDONALD C. COOK NUCLEAR PLANT UNIT NOS.1 & 2

BRIDGMAN, MICHIGAN'

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July 1, 1978 through December 31, 1978

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Docket Nos. 50-315 & 50-316,License Nos. OPR-58 & DPR-74

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