ML19308D471

RO-77-133E:on 770930-1007,air Inhalation Sample Station C41 Gross Beta Activity Exceeded Control Station Activity.Caused Control Station Activity.Caused by Fallout Due to 770919 Nuclear Weapons Test by Peoples Republic of China

ML19308D471
Person / Time
Site:	Crystal River
Issue date:	11/07/1977
From:	FLORIDA POWER CORP.
To:
Shared Package
ML19308D446	List: ML19308D445 ML19308D471
References
NUDOCS 8002280781
Download: ML19308D471 (1)

Text

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ENilRONMENTAL LICENSEE EVENT REPORT 77-133E cility: Crystal River Unit #3

2. Report Date: I November 1977 *

3. Cccurrence Date: 30 September through 7 October 1977

4. ConfiHiation Date: 28 October 1977

5. Identification of occurrence:

Air inhalation sample station C41 showed gross S activity in excess of ten times the control station activity.

6. Conditions Prior to Occurrences Crystal River Unit #3 was operating in Mode 1, power operation.

7. Description of occurrence:

The weekly ai; umple at station C41 for 30 September - 7 October 197'~ was analyzed for I-131 activity. The activity was 0.13 pCi/m3 This is greater than 10 times the control station value which is the smaller of 0.004 pC1/m3 s.

(upper 95% percentile value from the preoperational program) or 0.13 pC1/m3 (upper 95 percentile from operational stations outside of the plant's influence).

8. Designation of Apparent Cause:

The apparent cauac of this occurrence is the fallout resulting from the nuclear weapons tent by the Peoples Republic of China on 19 September 1977. A sittilar increase in airborne activity levels was reported throughout the State of Florida.

[9. Analysis of Occurrence:

Crystal River Unit reporting level to be#3 did not cause the radiological environmental monitoring exceeded.

O. Previous Occurrenecs:

This is the accond occurrence of this particular t.ype subseque_nt to the issuance of the Crystal River Unic #3 Facility Operating License, humorous similar occurrences were detected during the preoperational program.

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