ML19321B138
| ML19321B138 | |
| Person / Time | |
|---|---|
| Site: | Zimmer |
| Issue date: | 07/15/1980 |
| From: | Peltier I Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8007280123 | |
| Download: ML19321B138 (56) | |
Text
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+y.s'o, UNITED STATES E ,, c ' j NUCLEAR REGULATORY COMMISSION
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C WASHINGTON, D. C. 20555
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JUL 151980 Docket No. 50-358 APPLICANT:
Cincinnati Gas & Electric Company FACILITY:
Zimer Nuclear Power Station
SUBJECT:
MEETING ON ZIMMER INTAKE STRUCTURE - JUNE 24, 1980, BETHESDA, MARYLAND
Background
About a year ago, Cincinnati Gas and Electric reported two potential 50.55e items to the NRC.
One item concerned service water pump noise and vibration and the other concerned silt build-up in the plant intake structure.
Both of these items were investigated and found to be non-related.
It was concluded also that the pump problem was a reportable 50.55e item but that the silting problem was not.
The purpose of the meeting was to brief the staff on the results of the investigation and the corrective measures that are being taken. A list of meeting attendees and presentation material are attached.
Summary According to Cincinnati Gas & Electric Company, erosion of the service water pump impeller, which resulted in noise and vibration, was caused by operating the pump at off design flow and was unrelated to ingestion of silt from the suction bay. The pump was designed to operate at LOCA flow rates and when operated at flow rates much lower, during normal operation, it was the victim of internal recirculation which resulted in impeller erosion. The pumps (4) are being fitted with impellers of a new design and the service water system is being modified to automatically assure excess of minimum flow requirements.
The system modifications are in the non-essential division and therefore essential water supplies are not affected by the modifications.
Cincinnati Gas and Electric reported the conclusions of it's study of the intake structure silting and its plans for monitoring silt build-up and for removal.
An electronic monitoring system will be installed in the intake structure and special equipment is being designed for periodic silt removal. Cincinnati Gas and Electric will report on the effectiveness of the approach in September of 1980 and will propose technical specifications requiring the necessary surveillance and build-up limits.
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L,A, 2-JUL 151980 Staff reviewers will provide the prcject manager with any questions or requests for additional information, necessary for their review of this matter, hopefully in time for the responses to be included in the applicant's September report.
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A I. A. Peltier, Project Manager Licensing Branch No. 2 Division of Licensing
Enclosures:
As stated cc w/ enclosures:
See next page O
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Mr. Earl A. Borgmann Vice President - Engineering Cincinnati Gas & Electric Company P. O. Box 960 Cincinnati, Ohio 45201 cc:
Troy B. Conner, Jr., Esq.
David B. Fankhauser, PhD Conner, Moore & Corber 3569 Nine Mile Roaa 1747 Pennsylvania Avenue, N. W.
Cincinna.i, Ohio 45230 Washington, D. C.
20006 Dr. Frank F. Hooper Mr. William J. Moran School of Natural Resources General Counse.1 Ann ' Arbor, Michigan 48109 Cincinnati Gas & Electric Company P. O. Box 960 fis. Augusta Prince, Chairperson Cincinnati, Ohio 45201 601 Stanley Avenue Cincinnati, Ohio 45226 Mr. William G. Porter, Jr.
Porter, Stanley, Arthur Charles Bechhoefer, Esq., Chairman and Platt Atomic Safety & Licensing Board 37 West Broad Street Panel Columbus, Ohio 43215 U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Mr. Steven G. Smith, Manager Engineering & Project Control Mr. Glenn 0. Bright Dayton Power & Light Company Atomic Safety & Licensing Board P. O. Box 1247 Panel Dayton, Ohio 45401 U. S. Nuclear Regulatory Commission J. Robert Newlin, Counsel Dayton Power & Light Company Leah S. Kosik, Esq.
P. O. Box 1247 3454 Cornell Place Dayton, Ohio 45401 Cincinnati, Ohio 45220 Mr. James D. Flynn, Manager W. Peter Heile, Esq.
Licensing Environmental Affairs Assistant City Solicitor Cincinnati Gas & Electric Company Ronm 214, City Hall P. O. Box 960 Cincinnati, Ohio 45220 Cincinnati, Ohio 45201 Atomic Safety & Licensing Board Mr. J. P. Fenstennaker Panel Senior Vice President-Operations U. S. Nuclear Regulatory Comission Columbus & Southern Ohio Washington, D. C.
20555 Electric Company 215 North Front Street Atomic Safety & Licensing Appeal Columbus, Ohio 43215 Board U. S. Nuclear Regulatory Commission David Martin, Esq.
Washington, D. C.
20555 Office of the Attorney General 209 St. Clair Street First Floor Frankfort, Kentucky 40601
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Mr. Earl A. Borgmann cc:
Resident Inspector /Zimmer U. S. Nuclear Regulatory Commission P. O. Box 58 New Richmond, Ohio 45157 Dale D. Brodkey Assistant Attorney General Division of Environmental-Law i
Office of the Attorney General 209 St. Clair Street Frankfort, Kentucky 40601 1
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MEETING WITH CG&E ZIPHER INTAKE STRUCTURE JUNE 24, 1980 ATTENDEES NRC
!. Peltier C. Hickey T. Johnson D. Jeng C. Hofmayer G. Lanik C. Tan R. Stephens G. Lear P. Chen CG&E W. Waymire H. Brinkmann J. Schott B. Ellis J. Herman J. Flynn S&L R. Pruski M. Clemens R. Scheibec S. Bhamidipaty
AGENDA CGE/NRC MEETING WM. H. ZIMMER NUCLEAR POWER STATION UNIT-1 SERVICE WATER SYSTEM 1.
INTRODUCTION:
BACKGROUND FOR MEETING OVERVIEW PLANT ORIENTATION-2.
PUMP MODIFICATIONS:
OVERVIEW OF SERVICE WATER SYSTEM DISCUSS MECHANISMS PUMP VIBRATION NEW IMPELLER DESIGN MIN. FLOW CONTROL SYSTEM EXPECTED OPERATION NEW PUMP CLOW CONTROL 3.
SILT SITUATION:
SOURCE OF SILT AMOUNT SILT EXPECTED IMPACT ON PLANT SILT REMOVAL PLANS SILT DETECTION PLANS 4.
SUMMARY
5.
NRC COMMEf!TS:
6/24/80 HCB
BACKGROUND CGE/NRC MEETING WM. H. ZIMMER NUCLEAR POWER STATION UNIT-1 SERVICE WATER SYSTEM A.
REPORTED (2) POTENTIAL 50.55e ITEMS 1.
SERVICE WATER PUMP NOISE AND VIBRATION 2.
SILT BUILD-UP INTAKE STRUCTURE B.
INVESTIGATION ESTABLISHED SILT:
1.
SILT DID NOT IMPACT PUMPS 2.
MAINTENANCE WILL PREVENT BUILD-UP PUMPS:
1.
VIBRATION DUE TO MINIMUM FLOW 2.
RELATED NORMAL VS. DESIGN CONDITIONS 3.
SYSTEM MODIFICATION REQUIRED i
C.
INVESTIGATION CONCLUDED 1.
PUMPS ARE REPORTABLE 50.55e 2.
SILT IS NOT REPORTABLE 50.55e 6/24/80 HCB
PUMP MODIFICATIONS SERVICE WATER SYSTEM INITIATING EVENTS INVESTIGATION
- DESCRIPTION OF THE PHENOMENA SEASONAL VARIANCES NEED FOR MINIMUM FLOW IMPROVEMENT PUMP CHANGES t
SYSTEM CHANGES
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- DESIGNED FOR LOCA, FLOOD, SEISMIC, OTHER DESIGN BASIS EVENTS STRUCTURE INTAKE FLUME
- 4 SERVICE WATER PUMPS 2 COOLING TOWER MAKE-UP PUMPS PUMPS (4)
BINGHAM - WILLAMETTE COMPANY HORIZONTAL, SINGLE STAGE, DOUBLE SUCTION DOUBLE VOLUTE, CENTRIFUGAL PUMP 12,500 GPM, 295 FT TDH, 1250 HP, 1800 RPM PIFING
- ESSENTIAL 3 NON-ESSENTIAL DIVISION ESSENTIAL - PHYSICAL 3
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- RUN PERIODICALLY DURING CONSTRUCTION 2 PUMPS RUN-ONE AT A TIME
- OTHER PUMPS RUN ONLY FOR TESTING MARCH, 1979
- ONE PUMP OUT OF SERVICE FOR MAINTENANCE
- CASING OPEN AND INSPECTED IMPELLER EROSION FOUND
- BELIEVED EROSION DUE TO CAVITATION fro J"e0NTROLLED FLOW DURING CONSTRUCTION OR SUCTION PuCCKAGE APRIL, 1979
- TESTING BEGAN 6/ 24/80 BEE-
o INVESTIGATION 4-2-79 REPORTED SILT 2 FEET ABOVE SUCTION PIPE 4-11-79
- IN-PLANT TEST - TWO PUMP OPERATION INCREASED VIBRATION AND NOISE
- POSSIBLE SUCTION BLOCKAGE OR AIR VORTEXING 7-17-79 PUMP BAY CLEAR - PUMPS WERE RUN AGAIN SIMILAR INCREASE IN VIBRATION 3 NOISE NO SUCTION BLOCKAGE OR AIR VORTEXING POSSIBLE PUMP LOW FLOW RECIRCULATION - BETTER TEST NEEDED 8-9-79 IN-PLANT TEST MONITOR FLOW & VIBRATION
$1GNIFICANT INCREASE IN NOISE AND VIBRATION BELOW 1U,Iu0 GPM J
8-10-79 REPORTEDTONRCRcQIQp) (E)
III 0FFICES AS POSSIBLY REPORTABLE UNDER $U.b 6-24-80 NOW CONFIRMED REPORTABLE 1.
IF UNCORRECTED WOULD AFFECT SAFETY PERFORMANCE 2.
SIGNIFICANT DEVIATION FROM PERFORMANCE SPECIFICATION
- MEETS DESIGN PERFORMANCE POINT
- D ES NkT MEET BROAD OPERATING RANr-E l
( -100 1 SPECIFIED 6/24/80 BEE
DESCRIPTION OF THE PHENOMENA SPECIFICATION REQUIREMENTS
- ONE DESIGN PERFORMANCE POINT (12,509 GPM)
- APPLICATION REQUIRED BROAD OPERATINC-RANGE (0-100%)
VENDOR DESIGN
- DESIGN FOR ONE POINT (BEP)
- GUARANTEES ONLY ONE POINT NOT OPERATING RANGE CONSEQUENCES
- ROUGH OPERATION AT OFF PEAK PERFORMANCE INTERNAL RECIRCULATION
- FLOW ANGLES CHANGE
- UNEVEN PRESSURE 3 VELOCITY DISTRIBUTION
- INCREASED NOISE AND VIBRATION - RESULTS IN ACCELERATED WEAR - NOT CATASTROPHIC FAILURE IMPACT VARIES WITH PUMP DESIGN PARAMETERS 6/24/30 BEE
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O SEASONAL VARIANCES GENERAL
- HEAT EXCHANGERS DESIGNED FOR ONE SET OF CONDITIONS INLET, OUTLET TEMPERATURE SHELL SIDE INLET, OUTLET TEMPERATURE TUBE SIDE
- SHELL SIDE, TUBESIDE FLOWS
- VARIANCE IN ANY ONE WILL AFFECT THE OTHERS ZIMF1ER - TYPES OF FLOWS
- CONTINUCUS - FLOWS REGARDLESS OF PLANT CONDITIONS
- MODULATING - FLOW CONTROLLED BY PROCESS TEMPERATURE
- MISCELLANEOUS - INTERMITTENT RIVER VARIATIONS
- MAINTAIN PROCESS OUTLET TEMPERATURE CONSTANT
- WATER SIDE FLOW VARIES WITH INLET TEMPERATURE
- DESIGN RIVER TEMPERATURE 95 F
- ACTUAL NORMAL TEMPERATURE 35-85F
- NORMAL FLOW AT DESIGN TEMPERATURES 12,100 GPM NORMAL FLOW AT NORMAL TEMPERATURES 2,000-7,000 GP.*
NPSH VARIATION
- RIVER AT POOL - 47 FT NPSH LOSS OF DOWNSTREAM DAM - 35 FT. NPSHA LOSS OF FLOW INTO POOL WITH LOSS OF DOWNSTREAM DAM - 33 FT. NPSHA 31 FT. NPSHR - DESIGN POINT DESIGN POINT CONSERVATIVE 6/24/30 SEE
s NEED FOR MINIMUM FLOW IMPROVEMENT
- SELIEVED PUMPS WOULD OPERATE OVER 2,000-7,000 GPM RANGE
- NO MIN. FLOW CONTROL SPECIFIED
- ORIGINAL PUMP MINIMUM FLOW SHOWN TO BE 10,000 GPM PUMP MINIMUM FLOW IMPROVEMENT PURSUED I
- SYSTEM MODIFICATIONS PURSUED I
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PUMP CHANGES OPTIONS CONSIDERED
- VENDOR MODIFIED IMPELLER
- MEETS DESIGN POINT
- MINIMUM FLOW 7,500 GPM NEW PUMP DESIGN
- NO QOMMERCIALLY AVAILABLE PUMP COULD MEET 2,000 TO /,000 GPM RANGE AND STILL MEET 22,530 RPM nFSIGN VENDOR RE-DESIGN NEW IMPELLER SMALLER EYE - INCREASE SUCTION VELOCITY
- SAME NUMBER OF VANES
- STAGGEPEG VANE DESIGN - STRONGER DIFFERENT. VANE ANGLES - BETTER CCF PEAK PERFORMANCE
- MEETS ORIGINAL DESIGN POINT
- MINIMUM FLOW 7,500 GPM 4
CONCLUSIONS NEW DESIGN IMPELLER BEST CHOICE STRONGER
- BETTER OFF-PEAK PERFORMANCE
- MEETS ORI3!NAL DESIGN POINT
- BEST SOLUTION AVAILABLE UNDER DESIGN CONSTRAINTS
- MINIMUM FLOW CONTROL REQUIRED 6/24/30 BEE
SYSTEM CHANGES - MINIMUM FLOW CONTROL DESIGN CRITERIA
- MAINTAIN FLOW AT OR ABOVE 8,000 GPM PER PUMP
- MUST NOT DEGRADE ALREADY ACCEPTED SYSTEM DESIGN PROVIDE FLOW MEASUREMENT AT EACH PUMP ALARM AT FLOWS BELOw 7,500 I
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SERVICE WATER INTAKE STRUCTURt; SERVICE WATER PUMPS (4)
BYPASS VALVES (8)
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ESSENTIAL PLANT LOADS
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STRilCTilRE TURBINE BUILDlHG CAPACITY PER PUMP 8,000 GPM 8,0f;J GPM CLASS OF VALVES AND PIPING SECTION 111 ANSI B31.}
PIPING MODIFICATIONS MAJOR REVISIONS ?. ADDITIONS BYPASS VALVES ADDED IN TO SECTION 111 PIPING NON-ESSENTIAL PIPING.
PilYSICAL SPACE FOR VALVES DIFFICULT ARRANGEMENT DUE TO MORE SPACE FOR PIPE AND AND PIPING LACK OF PHYSICAL SPACE AND VALVES.
REQUIREMENT FOR MAINTAINING WATER TIGitT ROOMS.
PROVIDING WATER TO VALVE MUST CLOSE TO INSURE NON-ESSENTIAL PORTIONS OF ESSENTIAL EQUIPMENT ADEQUATE ELOW TO ESSENTIAL SYSTEM ARE ISOLATED.
EQUIPMENT.
FLOW TO ESSENTIAL COMPONENTS ASSURED.
TYPE OF MINIMUM ELECTRIC MOTOR-OPERATED AIR-OPERATED VALVES CAN BE FLOW CONTROL OPEN/CLOSE VALVES SINCE NO MODULATED.
ESSENTIAL AIR SYSTEM.
NUMBER OF MINIMUM TWO II,000 GPM VALVES ONE 8,000 GPM VALVE FLOW VALVES PER PUMP FAILURES Fall CLOSED AUTOMATIC FLOW CollTROL (10T AllT0MATIC FLOW CONTROL NOT ASSURED ASSURED FAIL OPEli PARTIAL LOSS OF SERVICE MATER NON-ESSENTIAL PORT 10N IS0-i LATES ON LOW llEADER PERSSURE 6/ 2'I 30
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ESSENTIAL vS NON-ESSENTIAL CONTROL NON-ESSENTIAL VALVES CHOSEN
- DOES NOT ADD COMPLEXITY TO ESSENTIAL SYSTEMS LOSS OF FLOW CONTROL WILL NOT IMMEDI ATELY AFFECT SAFETY PERFORMANCE
- CAUSES FOR NON-ESSENTIAL PORTION ISOLATION
- LOSS OF OFFSITE POWER - VALVES CLOSE ON DIESEL POWER
- EFFECTS OF NON-ESSENTIAL PORTION ISOLATION
- MINIMUM FLOW ASSURED BY ESSENTIAL EQUIPMENT
- RHR HEAT EXCHANGER
- RBCCW HEAT EXCHANGER
- DIESEL GENERATOR HEAT EXCHANGERS 6/24/80 BEE
SERVICE WATER INTAKE STRUCTURE SERVICE WATER PUMPS (4)
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OPTIONS CONSIDFRFD TWO REMOTE MANUAL VALVES REgy1RES OPERATOR ACTION TO MAINTAIN FLOW ABOVE 8,UUU GPM WITH ONE PUMP PER LOOP ONE CONTROL VALVE, ONE MANUAL VALVE REQQlRES OPERATOR ACTION TO MAINTAIN FLOW ABOVE 8,0UU GPM PER PUMP ONLY WHEN TWO (2) PUMPS PER LOOP ARE OPERATING T40 CONTROL VALVES REgy1RES NO OPERATOR ACTION TO MAINTAIN ELOW ABOVE 8,UUU GPM PER PUMP
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AUTO-C.ONTROLLED BYPASS CWE OR TWO VALVES PER LOOP 8000 GPM EACM
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RHR HEAT EXCHANGERS 2.
RBCCW HEAT EXCHANGER DIESEL GENERATOR COOLERS MUST NOT DEG9ADE ALREADY ACCEPTED SYSTEM DESIG51:
NON-ESSENTIAL PORTION CAN BE ISOLATED PROVIDE FLOW MEASUREMENT AT EACH PUMP:
FLOW MEASURED UPSTREAM OF COMMON HEADER ALARM AT FLOWS BELOW 7,500 GPM:
SENSED BY FLOW ELEMENTS PAINTAIN AUTO-START MANUAL TRIP LOGIC:
NO CHANGES PROPOSED 6/24/30 BEE i
o
SUMMARY
EROSION FOUND IN PUMP IMPELLER DETERMINED TO BE CAUSED BY LOW FLOW RECIRCUt.ATION PUMP MINIMUM FLOW AS MODIFIED - 7,500 GPM MINIMUM FLOW CONTROL REQUIRED TO PREVENT ACCELERATED WEAR ON THE IMPELLERS.
DESIGN CRITERIA MET WITHOUT DEGRADING ACCEPTED SYSTEM LOGIC "f
6/24/30 SEE'
o I.
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LOCATIOM MAP ZlMMER INTAKE SEDIMENTATION STUDY CIN CINNATI GAS f ELECTRIC Co.
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LAYOUT OF INTAKE FLUME AND set 2VICE WATE/2 PUMP STre.
ZIMMER INTAKE SEDIMENTATION STUDY
\\
/
mm. m.
BOOM
,oHIC (EI VEll SM
~
MAXtMUM PROBABLE F1.C O D EL. 54G'- C" k L NTAKE FLUME ies? (. MODIFIED)G" gt, sfo ' o "
Ft.co D E L. 5 0 8'-
$ Eh i
15 ' O
/6 - 0
/ 5 '- o "
ll l'o
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=
g i
SHEET P/l. /N G
.e.
$ E Y.
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~~
- EL. 455' 0
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.5ECTl O N "A - A" ZlMMER STATION INTAKE FLUME
- .=***mes--
m eme, e% eeen.e me.e
,.m.
- 4. COOLNG Tt4R MAKE-UP L4ATER PUHPs k SERVICE tdATER k 6ER'v'tCE POMP 6 A
R PUMPS p
p
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TRAVELING U
sc.REENS (4) l Pt. A N Y.L.4 55' l
SERVICE WATER PUMP STRUCTURE WM. W. ZIMMER STATIOhJ g
7-
~
~~
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EL. 521'O jg s
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^
SERV /CE WRTER PUMP STRUCT' RE
\\
U (SECDON)
~'-
~
d.C. N
- g HISTORY OF THE FLUME CONSTRUCTION 1.
Flume was constructed in 1976 - The top of the sheet piling side walls is Elev. 510.
The top of the temporary cut-off wall that was on river side was Elev. 463.
2.
The fiume was dewatered and the concrete slab at Elev. 437 was poured between 9/9/76 and 9/13/76.
3.
The concrete plugs that held water out of the structure were removed on 2/16/78.
4.
Two (2) pieces of sheet piling were cut in the cu.t-off wall from inside and lifted up about 10' t betw.en 3/1/73 and 3/7/73.
5.
The balance of the cut-off wall was removed between 9/28/79 and 9/30/73 from the outside.
i l
6 One (1) pump with a capacity 12,500 G.P.M. has been pumping water from the S.W.P.S. since March, 1978.
l s
W. H. ZIMMER STATION ESTIMATED SEDIMENTATION IN INTAXE FLUME Ate SERVICE '/ATER FUMP STRUCTURE.
b 1.
HISTORICAL SEDIMENTATION SEi
- FROM OCTOBER 1976 To MAY 1979 12.0 5.0 2.
ANNUAL SEDIMENTATION
-AVEMGE ANNUAL FLOW C0tOITIONS 16.0 3.0 YEAR ANNUAL FLOW CONDITIONS 20.0 10.5 3.
MAXIMUM MONTHLY SEDIMENTATION
-AVERAGE ANNUAL FLOW CONDITIONS 2.8 1.4 YEAR ANNUAL FLOW CONDITION 3.0 1.6 YEAR MONTHLY FLOW CONDITIONS 4.7 2.4 4.
SEDIMENTATION DURING FLOOD EVENTS
-100-YEAR FLCOD 5.0 2.5
-200-YEAR FLOOD 6.0 2.6 6/24/30 JCH
(
END OF SWEET PtL\\MCS
/
-3,.
9 bJoRMAL 0410
}
()
RtVER Pool y
5 Tc9 of SEDIMENT
_ 4Go
'r, DEPostTioW
- 455 6 L
-450 2
- "'"** ?. W.. *... M.,*"*, ~.,, y,-..M_,g p,.,==*.9="*.***',.
..g
,,e..W,......---
- 44o
<:c 455 Ld t.
. e : :..
CONCRETE SLAB
+.a. '. >.. 'M J
u; 10 0 so i
l b-atsTANCE ALOMG FLUME CENTERLINE MER INTAKE 9'LUME SEDiMENTATIObJ STUDY t
AP RiL -1".>7#)
l
J. C. l+ -
2200' 440' M'
. _ uo'. _ ::o',
m' uo' l
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l 1
1 l
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l l
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O __ _ _ i ___e___e___e___t r
LEGEND l
0 3*sre80eo 3scismor faam ss
- INCIHNATI G As t'
E;,.acG1c. c,sprnNy i
O.
SED Marsasas,. Smrs.s.s gy,,,g z g
,,g y,m 7m
$7,., y G
Ben S"* w DED l'D'"*" ~ f L CCATION $ of SAmpc!NG 2018 75 km ettres04t. Ses==ar 19h4 R CH 198G SWR VE Y' MAnt1A f%, Mig A!N(y CC, pf jegg (f007 #;l1 SC.A L.E.)
N O O
Z U)
OC LU c..
III O
-1 WATER YEA)t 1951(25* YEAR EVENT)
MAXIkfuM ANNUAL fwW OF RECORD
.300 k
y..
F-7
((940-/963) b D
I l
O tt.
s
~~
~~~
O 20 '
(FwW)
L ~ ~ ~I s
Q F - - ~#~ ~ ~
s
_[_
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/fo --
l k
i (FLOW)
/
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IE'
/
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e
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l
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c - --
L - -
r- - - -
i o
O OCT ' NOV ' DEC JAM FEB MAR ' APR 'MAY JUN JUL ' AUG SEP 0
MOAITH rnd psg EKPECTED AVERAGE FUTtJRE SEDIMENTATION IN Tile FLUME
- .,q y
- f. 5 (Fl.0ME DISCHARQE = 4 +500 GPM)
)
^
, 15
(
e
.C. M
/Z w
Table 6
. 6 srsIMmrTATION RATES 1/
IN TEZ INTAKE PLUME AND SERVICE WATER PUMP STRUCTURE Month Sediment Decosit, ft.
Intaste Plume '
Serrice Water s
Pump Structured /
Asseraga 25-Year Average 25-Year L====1 Flear Annual Flow F1ene Event
_F1ow Event Oct.
.4
.5
.2
.3 Nov.
.7 1.5
.4
.8 Dec.
1.5 2.8
.7 1.4 Jan.
1.7 2.7
.9 1.3 Feb.
1.8 2.8
.9 1.4 Mar.
- 2. S 3.0' l.4 1.5 Apr.
2.4 2.3 1.2 1.5 May 1.9 1.5 1.0
.9 Jun.
1.2 1.4
.6
.8 Jul.
.6
.7
.3
.4 i
Aug.
.6
.1
.3
.1 Sep.
.4
.2
.1
.1 Total 16.0 20.0 8.0 10.5 1/
Saeed en a centinuous flow of 47,500 gym in the flume l
2/
Length of flume = 155 ft.
Width of flume 30 ft.
=
3j Length of SWPS 52 ft.
=
Width of SWPS 22 ft.
=
%6
o.
SILT DEPOSITION ELECTRONIC MONITORING SEVEN ULTRASONIC TRANSDUCERS
- SIMILAR DEVICES IN USE TO DETECT SLUDGE LEVELS IN TANKS
- MONITOR PANEL - LOCAL
- ALARM-LOCAL-CONTROL ROOM
- ALARM SETPOINT-3 FEET (2 FOOT MARGIN)
PREVENTI0tl
- JETTING N0ZZLES IN PUMP BAY
- KEEP SILT IN SUSPENSION
- USE COOLING TOWER MAKE-UP PUMPS a
)
s.
6/24/30 BEE
I cocuNG TOWER MARY.-UPPUMPb(2)
A B
SERVICE WATE.R C
FUMPs (4) b
~j j_
'C+O j
6ERV\\ C E WATER J
D PUMP STRUCTURE '
A j
\\
n TRAVEUWG SCREEN 5 (4) -
l'
)
LOCATtoN OF TRANSDUCERS 4
i i
LAYOUT OF INTAKE FLUME AND SEl?VICE WATER PUMP STR.
ZIMME/F INTAKE SEDIMENTATION STUDY 11 _ Um y
/
i ULTR A 6CWIC TRANSDUCERS (7) b h
'/
/,
H I O RIVER Q
'N O
e 4ee
--s I
3,._
's 0
MAXIMUM PROSABLE[
Flood EL. 54G'- O" 4
tNTAKE FLUM E 1937 ( MODIFIED)G"
~
EL. S/o ' o FLoco E.L. S o e'-
15 - 0
/6 - 0
$ 67..
j 5 '. o "
{ 1:o" 80 0 '- 8, ~N E
if
\\
{
[
SHEET P/L /N G
$ EL. 4 73 ' S$ -'
~y i
E E L. 45s'-/)k' M*AlfEEE y EL. 92.= - o 1
[
TRANSDU CER '
-~
w
? PUM]P SUC r/0 W P/P E d2. 938'G" Q
7 '.t. + 3 s - o
- e N
V cwc.eere swa j' u
.5ECT) O N "A - A" ZlMMER STATION thlTAKE FLUME SUBJECT ET NO.
~
- 4. C,00UMG TWR MAKE-UP t JATER PUHPb k SERVICE
~
WATER p0MPs k 6EPNtCE 1 J A'TER p
q PUMP 5 i
i!
N/
I i\\ / l 7
/N l
l V \\1 1
I
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ll y
yp
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?
i 4
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l
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r- + +
-s
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I s
I
/
\\
H-H H-+1
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m,.
s e
TRAVElINC'(4) g ~'""
SCREEM6 gt, r
'~'
coNTRot SYSTEM 7
f
~
F PLAM E !. 4 5 5 '
SERVICE WATER PUMP STRUCTURE WM. W. ZIMMER STATIObJ g.,,
5C3tj3CI NO.
0 EL.521t0 tg
>(O?
!(s 4
E-1 l
FLeeo eF
$ i l m,.
w.,5.-
PCCRD.
,.. 3 g
L-g a.. a. n '.o
.=
x i
/
o
- L.sc9's!"Il\\/
L ti
,.\\n SEc/tcE
- i f 1
Q f
f' w M E 2.
h
=
S M IM Eia
,p s
L 3
,/EL!i9/42.
u _.
7 m
i lI I
~
w w
coeud4 f
k 1'CWE.2
,a MATS-UP
\\
&a N
5 WR722.
6EWiTd}=,.=.
/
% f, =i i
- -EL.?&4,5~j l
.m.
=
ii
.6
...;.i j
No1RMAL i
l W ATE.R,,
16
~
~ ~
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{
q
@ /.?51'5b" EL
~
u.4st:sys'ny:[,
4 15 P M B f::
l
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/
- ''''.y=. 1 o d j
. ~. ! W " M.,MEI.y35'o"
?.,. g
~..
P SLlif F17~$L COCl/MG falvEE MRKE-UP "f***
W/ifsz PdMP... '
..8
...e.
- e...
n n.
o.
.m
' ZIMMER STRT70AJ
~
SERVKE Wr7TER PUMP STRUCTUfE (secnon) e,***
" 2.. e C) 'a! C L. t 1
~
s<~
- 4. C4GLIMG TWR MAKE-UP WATER PUHPs
%,. SERVICE WATER k SER'v'tCE Pl) H P 6 - 3 WATER p
q PUMPS y
q r
N/
. N/
P
/X VN i
H H
I
]
!I Il Z
,r-x
__2 ! s l
- r C
L
~_3 iv n
57 K7 2h Zh b
\\
/
\\
l
\\
/
TRAVY.t.lN G U
sG. REEK 15 (4)
PLAhl EL.4S5' SERVICE WATER PUMP STRUCTURE WM. W. ZlMMER STATION i
T 'M c,e t a
=,,~ ~
r:,-
a-w -
1
X.
)
t I
LAYOUT OF INTAKE FLUME AND SERVICE WATER PUMP STl2.
ZlMME? INTAICE SEDIMENTATION STUDY Ot M 8
r u.a b
e JETTI N C, U
PUMP
(
&*DISCHA%ra6
/
e[
gesegyngy.
OHIO RI VE(2 t
RUPP PUMP t
WOMX SOAT
-m
==.*.em.
..me
.e.
M M
M
(%.'_
E D,%
p
~-
SCUR R Y R/2 VACUUM DIS C HR RG E CONT 20L VALVES g-p.
~
y N
/_
y PN E Uf.'n A TIC.
/
PUM PIN G CHAMBM S (3) l HECK VA L VE S 5
j'S I N 7*A ic E l
MC Z Z L ES (3) 20 TIVR T02- --
SECTION R-R
~
O e'
af
' o
__ __ _ s
\\
O x
\\
Wn 2)VER D2ED GING DEYlCE W. H. ZIM ME/2 STATIO N -
MMS ~
- Edh O 4 e
p, w a e.
qg g a
- 9 * *
- 9 V
s Z)MMER IN TAKE FLUME DR ED GING DEVICE DIS CHA RGE 4m EJECTOR
')
Vacuum l
l C
i B
A Q
O-8
- L 1 r i
I I4!_
"M_
'Ch r;
n-p-
q.
f.
l l
i
=.
=
s.
u a
HZ. PAESS.
A/A CHAMBER CHAMBER CHAMBER
.p.
.g.
.gn FILLING FILLED EMPTYING OPER ATIN G SC HEMATI C
/
2*
Y.
- ~
Gib
7/MMER.STATICN INTAKE R.UW1E DE'EDG ING TECHNI O UE O
T IN7~AXC FL UM E' EL. S/O' 0 lo' D
/
,e /PRAs*
15 ' O M-O l / 5 '- O " I l'O
~
i r
a o
EXISE CMADE
- _ _ ~
SHEE7" P/L /NG i
NORMAL WATE!? m EL..
+ 55 '- O "
c - --
\\
i l
t' l
, -- T/ C O N C..
EL. +3 7 ' 0 *
/9\\
x e
TREMIE CONCAC7'E SLAS c.
SU5dECT 30, a r _ -
s.
Table 6
)
i MCN"' SLY SEDIMENTATICN RATIS 1/
IN SE I:T2AKI FL*'ME AND SERVICI '#ATI2 PUMP S-'RCCTURE Menth Sediment 2eces it, ft.
In m e Fiumet' Ser nce 'aater, Pumo Structure 1 Average 25-Year Average 25-? ear Annual Flow Annual Flew
)
Flow Event Flev Event Cet.
.4
.5
.2
.3 Nov.
.7 1.5
.4
.5 3.,.
.sc.
..s
,3
.i a
Jan.
1.7 2.7
.9 1.3 Tec.
1.3 2.3
.9 1.4 Mar.
2.3 3.0 1.4 1.5 Apr.
2.4 2.3 1.2 1.5 May 1,9 1.5 1.0
.9
~
Jun.
1.2 1.4
.5
.3 a u.3
.6
.e
.3 Aug.
.5
.1
.3
.1 Sep.
.4
.2
.1
.1 Octal 16.0 20.0 3.0 10.5 1/
Based en a centinucus ficw of 47,500 gym in ene flame 2./. Length of fiume = 155 ft.
30 ft.
Width cf flume
=
52 ft.
_3/
Lancith of SWPS
=
22 ft.
Width of S*#PS
=
. - _. l
. ' * ~
SERVICE WATER INTAKE FLUME PUMPING DATA BASED ON: PNUMA NORTH AMERICA RIG EARZA STUDY i
PUMPING DATA 350 YDS.
SLURRY PER. HOUR 25% SOLIDS 80% EFFICIENT CALCULATIONS 300 YDS.
SLURRY PER HOUR BASED ON:
20% SOLIDS 60% EFFICIENT 300 *.20 *.60= 36 YDS. SOLIDS l
i PER HOUR WORST CASE SEDIMENT' DEPOSIT,FT. (YDS.)
MONTH AVG. FLOW 25-YR.
40-YR.
MARCH 2.8(485) 3.0(525) 4.7(875) 485 = 13.5 525 4.6 875
--=A
=24.3 36 36 36 l
i l:
~
e,**
SILT REMOVAL PLANS
- 1. COMPLETE REMOVAL OF SILT /SEDIyENT IN PUMP STRUCTURE AND FLUME BY SEP. 30,1980 2.
MONITOR SILT BUILDUP IN FLUME AND PUMP STRUCTURE DURING THE WATER YEAR OCT.1980 i
.THRU SEP.1981
- 3. VERIFY SILT REMOVAL CAPA3ILITIES THRUOUT THE WATER YEAR BY ACTUAL USE OF REMOVAL EOUIPMENT.
I J SLOP OPERATING AND MAINTENANCE PROCEDURES
.JR SILT MONITORING & REMOVAL BY OCT.1980.
- 5. VERIFY SILT BUILDUP & REMOVAL BY PHYSICAL OBSERVATION USING DIVING TECHNIGUES.
i 4
a E
f 4
WM. H. II.MMER iiUCLEAR F0WEP STATI0il SERVICE WATER SYSTEMS PPcSFilTATION SU"MoRY 1.
TWO (2) POTENTIAL 50.55E REPORTED:
A.
SILT NOT REPORTABLE - MAINT. ITEM B.
PUMPS ARE REPORTABLE - MOD. REQUIRED 2.
SILT-A.
DETECTION PROVIDED 3.
NOZZLES PAFVENT IN PUMP BAY C.
REMOVAL DEVICE IN INTAKE EQUI? MENT INSTALLED IN LATE JUNE, 1930 D.
MONITOR YEARS EXPERIENCE E.
SILT BUILD-UP WILL BE PREVENTED 3.
PUMPS:
A.
NEW IMPELLERS B.
MIN. FLOW SYSTEM C.
ASSURES FLOW TO ESSENTIAL SYSTEMS D.
ASSURES CPERATION ABOVE MIN. : LOW E.
RE-0CCUR ANCE PREVENTED 4.
CONCLUSION:
A.
BOTH POTENTIAL 50.55E INVESTIGATED BOTHARERESOLVEDBYPROVIDEDMODj930P[FATIONS 3.
FORMAL REPORTS TO NRC SEPTEMBER,.
C.
D.
TECH. SPEC. MOD. - JULY, 1931 5.
NRC COMMENTS REQUESTED:
6/24/30 uco