ML19343C114
| ML19343C114 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 02/10/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| BFRO-50-259-810, NUDOCS 8102180674 | |
| Download: ML19343C114 (7) | |
Text
.
TENNESSEE VALLEY AUTHORITY CH ATT A NOOG A. TEN N ESS EE 37 801 400 Chestnut Street Tower II Febmary 10, 1981 Mr. James P. O'Reilly, Director U.S. Nuclear Regulatory Commission Region II - Suite 3100 101 Marietta Street, NW Atlanta, Georgia 30303
Dear Mr. O'Reilly:
TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT, UNIT 1 -
DOCKET NO. 50-259 - FACILITY OPERATING LICENSE - DPR ENVIRONMENTAL REPORTABLE OCCURRENCE - BFRO-50-259/8105 The enclosed report is submitted in accordsnce with Browns Ferry's technical specification 5.6.3b.
This enclosure supplements our report by telecopy to you on Febmary 2,1981, from R. L. Abercrombie, Power Plant Superintendent, Browns Ferry Nuclear Plant, and provides details concerning the violation of pH limitation as specified in Section 2.2.1 (Appendix B) which occurred on January 31, 1981.
4 Very truly yours, TENNESSEE VALLET Abul0RITY i c.
L. M. Mills, Manager Nuclear Regulation and Safety l
l Enclosure I
cc (Enclosure)t l
Director Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555 Director (3)
Office of Management and Program Analysis U.S. Nuclear Regulatory Commission Washington, DC 20555 Coo 3 Director (40) y Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission
//
Washington, DC 20555 l
l l
31o2 g 6y9 4, ccm2, cc=c,o r., c-c c,e,
r LCO VIOLATIO!! REPORT a
)
s Report IIumber:
EFRO-50-259/8105 Report Date:
February 10, 1981 Occurrence Date:
January 31, 1981 Facility:
Browns Ferry !!uclear Plant Description of Violation
+
The combined discharge of spent demineralizer regenerants from the makeup water treatment plant and the biothermal research facility (B3F) discharge had a pH value of 9 2 units at 1645 CST hours on January 31, 1981, exceeding the maximum allowable pH value of 9.0 units immediately before offsite release.
Cause of Violation The exact cause of the violation is unWown. The pH of the spent demin-1 eralizer regenerant wastes before mixing with the DRF discharge was only 4.6 units en January 31, 1981, when the violation was discovered. We believe the cause was high pH values of the intake water which supplies Browns Ferry IIuclear Plant and the BRF. Samples collected from the intake bay and the river immediately above the intake at 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br /> (CST) en January 31, 1981, had pH values of 9 2 and 9.1 units, respectively. Also, the city of Muscle Shoals recorded a pH of c.2 units at 1800 hours0.0208 days <br />0.5 hours <br />0.00298 weeks <br />6.849e-4 months <br /> on February 4,1981, at their raw water intake at Fleet Hollow on the Tennessee River. These high pH values are attributed to algal blooms during very low river flow and clear water conditions.
Analysis of Violation An analysis of all plant pH data available before and after the violation indicates that the Environmental Technical Specification limit regarding the maximum diecharge pH was exceeded due to natural river conditions.
Since the violation was caused by natural phenomena in the river, no significant adverse environmental impact was experienced in Wheeler Reservoir because of-Browns Ferry IIuclear Plant.
m te u.
m u
s.
..m m
s
.G
-2 Corrective Action
)
The discharge of spent decineralizer regenerants waq stopped at 1645 hours0.019 days <br />0.457 hours <br />0.00272 weeks <br />6.259225e-4 months <br /> (C3T) on January 31, 1931, i=cediately after the violation was discovered.
Extensive sampling was then ocnducted within the plant and in the river to determina the cause of the violation.
Recemnendations to Avoid Future Viciation Since the violation was caused by natural phenomena in the river and was not plant induced, no further action is recc= ended at this tino.
-m m.
O i
o e
LCO VICLATION REPORT
)
A Report :umbe.-:
EFRO-50-259/8105 Report Date:
February 10, 1981 Occurrence Date:
January 31, 1981 Facility:
Browns Ferry Nuclear Plant Description of Violation The combined discharge of spent denincralizer regenerants from the makeup water treatment plant and the biotherca' cesearch facility (B3F) discharge had a pH value of 9 2 units it 1645 CST hours en January 31, 1981, exceeding the maximum allowable pH value of 9 0 units inmediately before offsite release.
Cause of Violation The exact cause of the violation is unknown. The pH of the spent de=in-eralizer reSenerant wastes before mixing with the BRF discharge was only 4.6 units en January 31, 1981, when the violation was discovered. We believe the cause was high pH values of the intake water which supplies Browns Ferry Nuclear Plant and the BEF. Samples collected fron the intake bay and the river immediately above the intake at 2l00 hours (CST) en January 31, 1981, had pH values of 9 2 and 9.1 units, respectively. Also, the city of Muscle Shoals recorded a pH of c.2 units at 1800 hcurs on February 4,1981, at their raw water intake at Fleet Hollow on the Tennessee River. These high pH values are attributed to algal bloo s during very low river flow and clear water conditions.
Analysis of Violation An analysis of all plant pH data available before and after the violatien indicates that the Environmental Technical Specification linit recarding the manicum discharge pH was exceeded due to natural river conditions.
Since the violation was caused by natural phenocena in the river, no significant adverse environmental impact was experienced in Wheeler Reservoir because of-Browns Ferry Nuclear Plant.
e
4
'a 2
_ Corrective Action The discharge of spant demineralizer reSenerants was stopped at 16145 hours (CST) on January 31,
,ol, i= mediately arter the violation was discovered.
Extensive sacplin;; was the n conducted within the plant and in the river to determine the cause of the violation.
Recemmendations to Avoid Future Violation Since the violation was caused by natural pheno:nena in the river and was not plant induced, no further action is recommended at this tico.
.~
e 1
he e
1 LCO VIOLATION REPORT
)
s
\\
Report Cumber:
BFRO-50-259/8105 Report Date:
February 10, 1981 Occurrence Date:
January 31, 1981 Facility:
Brcuns Ferry Nuclear Plant Description of Violation The combined discharge of spent denineralizer regenerants from the =akeup water treatment plant and the biothermal research facility (B3F) discharge had a pH value of 9 2 units at 1645 CST hours en Januar/ 31, 1981, exceeding the maxicum allowable pH value of 9.0 units ic=ediately before offsite release.
Cause of Violation The exact cause of the violation is unknown.' The pH of the' spent cemin-eralizer regenerant wastes before mixing with the 3RF discharge was only 4.6 units on January 31, 1981, when the violation was discovered. We believe the cause was high pH values of the intake water which supplies Browns Ferry Nuclear Plant and the BEF. Samples collected from the intake bay and the river 10:ediately above the intake at 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br /> (CST) en January 31,1981, had pH values of 9 2 and 9 1 units, respectively. Also, the city of Muscle Shoals recorded a pH of c.2 units at 1800 hours0.0208 days <br />0.5 hours <br />0.00298 weeks <br />6.849e-4 months <br /> on February 4,1981, at their raw water intake at Fleet Hollow on the Tennessee River. These high pH values are attributed to algal blooms during very low river flow and clear water conditiens.
Analysis of Violation An analysis of all plant pH data available-before and after the violation indicates that the Environmental Technical Specification linit 'regarding the caxi=um discharge pH was exceeded due to natural river conditions.
Since the violation was caused by natural phenomena in the river, no
- significant adverse environmental impact was experienced in Wheeler Reservoir because of-Browns Ferry Nuclear Plant.
G
=
9 w-e y
-4 y
y w
y y
e-.
,-w y
p
4, 1
l 1.
l Corrective Action i
)
The discharge of spent demineralizcr regenerants war.i stopped at 1645 hcurs
~
(CST) on January 31, 1931, immediately after the violation was discovered.
1 Extensive sampling uas then conducted within the plant and in the river to determine the cause of the violation.
I Recommendations to Avoid Future Violation Since the violation was caused by natural phenomena in the river and was not plant induced, no further action is recere. ended at this time.
i 6
t 4
k 1
k l
l l
l i
(
i i
l-L
-.,