ML19291B680

Nonroutine 30-Day Environ Rept 75-04:on 750906-20,measured Level of Radioactive Matl Exceeded Four Times Control Station Value.Caused by Sampling During Evaporator Condensate Tank Discharge.Normal Sampling to Continue

ML19291B680
Person / Time
Site:	Three Mile Island
Issue date:	11/20/1975
From:	Arnold R METROPOLITAN EDISON CO.
To:
Shared Package
ML19291B679	List: ML19291B678 ML19291B680
References
NUDOCS 7911110159
Download: ML19291B680 (1)

Text

ENCL 0SURE

.. .- 2etropolitan Edist Ocepany 28UlCGij uw. ::

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ThreeNo.

Dogket Mile Island Nuclear Station Unit 50-289 1 ('DiI-1)

Operating License !!o. DPR-50 Nonroutine 30-Day Znvironmental Report 75-04 n ,. .

s. .

18-2 $ $ [

. . . . - = -

Report on an Anc alous Measured Level of Radioactivity Descrintion of Measured Level A monthly ecmposite of veekly grab sa:ples of surface river w t about 15 activity milesx devnstrean of 1.20 10-6 frca the T'II-l river discharge a erhad collected attl pCi/cc as reported to Met-Ed on October 21, 1975. oa tritium This which was determined by Met-Ed's censultants pericd.

pCi/ce ,

eration du

_Possible Cause Discharges are made frc an irregular schedule based en unit operating conditionsthe TMI-l Liquid W for the radiological environmental conitoring progra basis.

Weekly grab samples this sample were taken during periods of evapcrater o form condeIt and, accordingly, during periods of higher-than-normal river watnsate tank discha er tritium level.

Analysis of Measured Level It is believed that neither the health nor safety of th by the occurrence represented by this sample in that: e public was threatened a.

Per=issible Concentration LevelThe level of tritiu activity axi=u was less tha

b. 61ven in 10CFR20 for = embers of the public.

The level of tritiu activity at the nearest devnstream source of continucus public use was a background level (4.11 x 10-7

c. uCi/ce).

No Technical Specification limit were exceeded.

d.

The event resulted frc TMI-1 Final Safety Analysis Report. normal unit cperations as described in the

_ Corrective Actienc The discharge of effluents frc= the Evaporator Condensat Analysis Repert. process associated with unit operatiens e Tank is a normal and is described in the F nal Safety in acco-dance with TMI-l Environmental Technical cations, Table 3.

SpecifiSampling nue 191111o/5-9 1572 004