ML19312D517

Supplemental RO 80-014/04L-0:on 800221,single Measured Value of Radioactivity Concentration in Critical Pathway Environ Medium Samples Exceeded Control Station Value.Caused by Coal Slag Pile.Pile Relocation Study Underway

ML19312D517
Person / Time
Site:	Crystal River
Issue date:	03/21/1980
From:	FLORIDA POWER CORP.
To:
Shared Package
ML19312D515	List: ML19312D514 ML19312D517
References
NUDOCS 8003240537
Download: ML19312D517 (1)

Text

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SUPPLEMENTARY INF0Pf1ATION

1. Rep' ort -No. : 50-302/80-014/04L-0

.2. Facility: Crystal River . Unit No. 3 3.- Report Date: March 21, 1980 ,

- 4. .0ccurrence Date: 4th quarter 1979 (discavered:' 21 February 1980)

'(conf"i rmed : 13 March 1980)

.(detemined at plant: 18 March 1980)

5. Identification of Occurrence:

A single measured value of radioactivity concentration in a critical pathway envircnmental medium samples exceeds ten (10) times the con-trol station value as defined in Appendix 3, Section 3.2.

6. Conditions ' Prior to Occurrence:

-N/A Description of Occurrence:

7.

The air c,oncentration for Thorium-232 of 0.2 pCi/m3 was greater than ten -(10) times the pre-operational level -of 0.008 pCi/m3 at sampling station-C-41.

3. . Designation of Apparent -Cause:

. The apparent cause of the occurrence was a coal slag pile, located six

,(6). meters south of. the air samoler at station C-41. The concentra-tion of. Thorium-232 was approximately.'1230 pCi/Kg in the soil sample at the coal slag pile. Soil concentration during the previous ' two years has been 49 pCi/Kg or less. Therefore, the increased air con-centration is attributed to the increased concentration from the coal siag pile.

9.- Analysis of Occurrence:

The ~. occurrence was not a result of the operation of Crystal River

~ Unit 3.

10. - Corrective Action:

Remedy of this situation by relocation of the coal slag pile or re-location of sampling '~ station -C-41 outside the influence of the coal slag pile is under = study.

11. Fail ure' Date:

.This is the first . report' for this type occurrence.

(Hill *(LER)0N62 8003240 h 7

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