ML19347A965

Environ Event Rept 80-03:on 800820,during Special Chlorination Program,Certain Levels of Chlorine Found Outside Circulating Water Sys That Exceeded Concentration Limits in Tech Specs 2.4.1

ML19347A965
Person / Time
Site:	Prairie Island
Issue date:	09/25/1980
From:	Ward P NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
RO-80-03, RO-80-3, NUDOCS 8009300573
Download: ML19347A965 (4)

Text

. _ _ _ _ _ _

.a

NSP NORTHERN STATES POWEN COMPANY winusApo u e. minussora es4oi September 25, 1980 Mr J G Keppler, Director, Region III Office of Inspection & Enforcement U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Mr Keppler:

PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket No. 50-282 License No. DPR-22 50-306 DPR-60 Environmental Event Report 80-03 Chlorine - TS B 2.4.1 On August 28, 1980, the plant circulating water system was subjected to a Special Chlorination Program designed to destroy the parasitic amoeba l found in the system. Conduct of the program was in accordance with the NRC authorization dated August 27, 1980.

During conduct of this program certain levels of chlorine were found outside the circulating water system that exceed the concentration limits set in TS-B 2.4.1. Although the protection conditions in this section are not strictly applicable to aspects of the special program, we are reporting the occurrence as an Environmental Event consis tent with TS-B 5.4.2. A.

During conduct of the six hour long chlorination cycle, recirculation canal water was found moving towards the river from the intake structure skimmer wall. Because of this condition, samples were collected on the river side of the skimmer wall and the following results were logged:

Chlorine Time Samples Total, ppm 10:42 Near the surface 0.0 11:15 Near the surface 0.15 11:45 Near the surface 0.7 12:45 Near the surface 0.80 13:20 20' toward the river 1.1 13:50 Near the surface 0.55 14:25 6' tcward the river 0.8 14:25 Under the wall 1.6 b 14:55 6' toward the river 1.2 bg 14 :55 Under the wall 1.4 {

8009300$73 s

D NCRTHERN STATES PCWER COMPANY Mr J G Keppler September 25, 1980 ,

Page J Our biologists have reviewed the incident and conclude for the short time that elevated chlorine levels were found, the environmental impact of this was minimal in magnitude and limited to the immediate intake vicinity. The high chlorine demand of the ambient river water would rapidly reduce the chlorine levels. A representative of the Minnesota Department of Natural Resources in attendance during the program observed that the chlorine levels did not cause significant fish kills.

For future chlorination programs, the blowdown from the plant will be increased in an attempt to prevent chlorinated water from moving into the river at the intake canal. During the just conducted special chlorination j program, blowdown flow to the river and natural evaporation was astimated  !

to be 25 cfs. Increasing the blowdown to 50-60 cfs will increase the flow cowards the plant intake and prevent recirculation of chlorinated water l l

into the river.

A complete report is being developed for the Minnesota Pollution Control Agency regarding the particulars of the program. The report scope will include test results of the success of destroying the parasitic amoeba and other items as fish losses and cooling tower drift. Copies of this report will be furnished to NRC as requested in the authorization documents.

Yours very truly, Q

E C Ward, PE Manager-Nuclear Environmental Services ECW/jh cc Director, NRR c/o DSB (17)

MPCA Attn: J W Ferman

NRC FORM 366 U. S. NUCLEAR f;EIULATORY COMMISSION (7 77) **

LICENSEE EVENT REPORT CONTROL BLOCK: l 1

l l l 1 1 Ih 6

(PLEASE PRINT CR TYPE ALL REQUIRED INFORMATION)

FiTT1 I 7 8 9 I I I LICENSEE CODE I I l@l15 le i I I I I I LICENSE NUMSER I I I I 26 l@l26 l I I LICENSE TYPE Jo I l@l57 carl 68 I@

CON'T

g"C; I l@l 0151 DOCKET o I oNUMBERlo 131 o 68I 6GI 69 1rlo lo I fi1_ i Bl@l VIREPORT 0101912 I80f1@

iOIii

' 8 60 81 EVENT DATE 74 75 CATE EVENT DhSCRIPTION AND PROBABLE CONSEQUENCES h O 2 i i rrm i 66 * 'f1EL i 10141l l iTTT11 I I O 16 i l l rdTn i i 101H 1 1 d

$O0E ##$E C0 SuSC$of COMPONENT CODE SUB DE S E O 9 I I l@ L_j@ L_J @ l l I I I I 18 L_J @ l l@

18 19 20 F 8 9 10 11 12 13

. SEOUENTI AL OCCURRENCE REPORT REVISION LE R RO REPORT NO CODE TYPE NO.

@ sjg; EVENT a

ITI IYDR l_]

23 1010131 24 26 l-l 27 1

28 I I 29 I

30 I L-J 31 l

32 I

_ 21 22 K N AC N ON PL T VET HOURS S8 1 FOR 8. SUP Lt MANUFAC RER I

J3 l@L_]@ J4 l

35 l@ l 36 l@ l 3/

i I I 40 I U@

41 L_l@

42 L_J@

43 l

44 l l l 47 l@

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h liiOi l i i i l I i 2 I I I

L'_L2J l i A I i

' ST ClNTS sPCwER OTwER STATUS E@SCO SRv' oiSCOvERv oESCRiPriON @

LLLJ L_J@ l l I l@l" "

l I l@l **

I

.aiviTv CO%NT RELEASED OP RELEASE LOCATION OF RELEASE @

ITTild L_1 @ l_l@l AMOUNT QF ACTIVITY 44 I

45

@I 80 I

F 9 10 11 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION i i l l I l@l_j@l I

, ERSO~~EL iN;u'd,ES NUMBER oESCRiPTiO~@

LLLaJ l J 8 9 I I 11 l@l12 80 I

LOSS OF OR DAMAGE TO FACILlTY TYPE DESCRIPTION 7

i 9 I 8 9 l@l10 I 80 e

33UE 7

2 O 8 9 t_ f@ltoDESCRIPTION i 68 69 i i i i i i i i i i i i li 80 NAME OF PREPARER PHONE:

f' AC FORM 366 U. S. NUCLEA'1 RE!ULATIOY COMMISSION (7 77) # '

- LICENSEE EVENT REPORT CONTROLBLOCKt l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

, 8 ITTT1I I I I I I l@l15 i I I I I I I I I I l@l26 I I I I I@l5 7 CAi T 68I@

7 8 9 LICENSEE CODE 14 LICENSE NUMBER 25 LICENSE TYPE JO CON T l E 8 EVE l60 l@lCl 61 Cl 0101 0 I Zlf t268 l@l 69 glo i 01 till61@l gl 01 EVENT DATE 74 79 oli 12.lfT@

REPORT DATE 80 l

7 OOCKET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I

LO_13 J l

[TTTII OO II I O 4 I i 10161 l l 10161l ,

i 10171 I I 10181 1 I ODE CODE SUB E COMPONENT CODE SU8 ODE SU E 10 l'31 l I I @ (,_j@ l._ j @ l l 1 l l 1 l@ l._j@ ( j @

4 7 8 9 10 11 12 IJ 18 19 20

. SEQUENTIAL OCCURRENCE REPORT REVISION LE R RO EVf NT YE AR REPORT NO CODE TYPE NO.

O aggg s

_ 21 11101 22 1-1 23 I o lo 13J 24 26 I-I 27 I

28 l i 29 I

30 I l-J 31 LJ 32 T K N ACT ON PL NT HOURS S8 t FOR 8. SUPPLI MANUF C RER I

33 l@lJ4 l@ l._j@

JS

(_j@

3d l_

3/

I I I I LJ@

41 l l@ l l@ l I I I l@

40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 11 101l l i i l I i 2 l l l

1 i LU l l

U_1.4 ] I 7 8 9 80 ST S  % POWER OTHER STATUS OtS O Y DISCOVEH, DESCRIPTION m L_J @ l I I l@l" I I I@l i

ACTIVITY CO$ TENT RELEASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE

/

l6l d h 8 9 10 l

11 44 I I 45 80 I

PERSONNEL EXPOSURE!

NUM8ER TYPE DESCRIPTION IiI 7I I I I l@L_J@l i PERSONNE L INJURIES NUM8ER DESCRIPTION U_La.] I 7 8 9 I I 11 l@l12 80 I

LOSS OF OR OAMAGE TO FACILITY TYPE DE SCRIPTION uj.fj8 l_j@l 9 10 I

7 80 1210l ISSVE[@

l l DESCRIPTION I lllllllllllllj 7 8 9 to 68 69 80 .

NAME OF PREPARER PHONE: