ML20096G503
| ML20096G503 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 04/30/1992 |
| From: | Bhayana G, John Miller, Spangenberg F ILLINOIS POWER CO. |
| To: | |
| Shared Package | |
| ML20096G496 | List: |
| References | |
| PROC-920430, NUDOCS 9205260109 | |
| Download: ML20096G503 (25) | |
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CLINTON POWER STATION RAW WATER TREATMENT AND ENHANCEMENT PROGRAM l-1 h
APRIL,1932 i-L I
l 9205260109 920518 PDR ADOCK 05000461 L
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O EXECUTIVE
SUMMARY
This Work Plan has been developed to address design, implementation and testing of a practical, simple, safe and reliable chemical and/or mechanical treatment system for the Clinton Power Station piping systems and components which utilize lake water as the cooling medium.
The treatment system shall be capable of preventing and mitigating effects of corrosion, scaling, micro and macro biological fouling.
A systematic and prioritized execution of the program activities is planned in four phases:
Inactivate existing Microbiological 1y Influenced Corrosion (MIC), Prevent it from recurring, Select chemicals for trial trLatments, and Implement permanent treatments utilizing the latest treatment technology and industry experience.
The Work Plan has been reviewed by the Program Task Force.
Management oversight f'Mt[bo Team Concurrenco:
J/ jA. Milfer, Manager N3 clear Station Engineering C
h F. A. Spangenberg/, Manager Licensing & Safety i
G.
Cook, Plant Manager 4 3o 92 Approved:
--i G.
K.
Bhayana, Project Manager Raw Water Treatment and Enhancement Program ES-1 RWTP
Rev.
0 2'ABLE OF CONTENTS Section Title Face No.
Executive Summary ES-1
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Table of contents TC-1 I.
Mission 1
II.
Scope 1
III.
Background
1 IV.
IIistory 3
V.
Goals 6
VI.
Regulatory Interface and 6
Compliance VII.
Program Organization 8
VIII.
Strategy 8
IX.
Performance Indicatoks 19 X.
Schedule 19 ATTACHMENT 1.
Program History 20 ATTACHMENT 2.
Program Support Organization 21 ATTACRMENT 3.
Lovel I Schedule 22 l
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O RAW WATER TREATMENT AND ENHANCEMENT PROGRAM 1
I.
Mission The mission of this program is to implement a practical, simple, safe and reliable chemical and/or mechanical treatment system designed in compliance with the state and federal regulations to prevent and mitigate the effects of corrosion, scaling and biofouling in CPS plant systems which utilize Clinton lake water as the cooling medium.
II.
Scope This program will address general corrosion, scaling, microbiological (induced and influenced) fouling and macrobiological (Asiatic Clams and Zebra Mussels) fouling in the following systems and structures:
Plant Service Water (WS)
Shutdown Service Water (SX)
Circulating Water (CW)
Fire Protection (FP)
Makeup Water (WM)
Potable Water (WD)
Intake and Discharge Structures III. Backcround A typical raw water treatment program is designed to prevent degradation caused by numerous biological, chemical and physical mechanisms which can collectively result in pressure boundary failures (seen in the Diesel Generator Heat Exchangers (DGHX's)), reduction in heat transfer capabilities (seen in the main condenser tubes as calcium carbonate scale), flow restrictions (silting seen in chilled water coolers) and reduced lifetime of piping and j
components.
The common degradation mechanisms are:
l 1.
Corrosion Corrosion can be defined as the destruction of metal by chemical or electrochemical reaction with l
its environment.
There are several types of corrosion:
l
- Pitting Intergranular corrosion
- Selective leaching Stress corrosion l
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' Galvanic corrosion cracking
- Crevice corrosion Erosion In cooling systems, corrosion causes two basic problems
- failure of equipment; and decreased plant efficiency due to fouling and loss of heat transfer from corrosion products.
Corrosion rates determine the metal loss 1
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0 with respect to time for the different materials of the system.
Most piping systems are designed with a corrosion margin.
If the corrosion rate exceeds the design margin, premature pipe and equipment replacement will be required to cbtain plant design life.
2.
scaling:
Scale is the precipitation of dense adherent materials on heat exchanger surfaces.
Scale acts as an insulator and decreases the abi:
- y of the heat exchanger to transfer heat.
Alt..ough heat exchangers are designed with a fouling factor, high scaling rates will rapidly deplete the reserve margin for the exchanger.
This would result in inoperable equipment and frequent maintenance outages for cleaning.
3.
Biofouling:
Biological fouling in cooling systems is the result of abundant growth and development of algae, fungi, and bacteria.
Fouling deposits cause poor heat transfer through exchanger tubes, reducing efficie.ncy.
Fouling can also restrict flow through equipment and
- piping, a.
Asiatic Clams:
Asiatic clams are a form of macrofouling.
These clams travel through water in the larval form and lodge in areas and grow, thereby restricting flow to equipment.
Asiatic clams are known to exist in Clinton Lake.
RF-3 inspection found an approximate population of 5,000 clama per sq. ft. in the intake structure of the screenhouse.
b.
Zebra mussels are somewhat similar to the Asiatic clams and can plug heat exchanger tubes and snall pipes.
But where the Asiatic clams float freely through the water until deposited, the zebra mussels can attach themselves to pipe walls and to one another, thus creating rapid and major flow restrictions.
Although zebra mussels have not yet been detected in Clinton Lake, they do exist in not too distant water
= bodies and it is believed that it is only a matter of time until they migrate to Clinton Lake.
4.
Microbiologically Influenced Corrosion (MIC) organisms:
Most waters contain various forms of MIC organisms.
If conditions ar6 conducive tc '.tpir growth, they can rapidly _ deteriorate system pressure boundaries.
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IV.
History The original design of the plant incorporated traveling screens and service water pump strainers to prevent large and small objects from entering the plant systems which are fed by the Clinton lako water.
In addition, gaseous chlorine was utilized to treat WS/SX, CW, WD und WM systems.
To address IE Bulletin 8' *" (Asiatic Clams), credit was taken for gaseous chlori 1 for prevention and compliance.
In 19e6, n
. ion was made to treat the Fire Protection (FP) syctem (P4-nc Mod FP-45) using gaseous chlorine.
Due to various design related and hardware problems, frequent gas leaks and an independent evaluation of the modification by MPR Associates, this mod was retired in place.
At the same time, a decision was made to utiliza liquid chlorine to trent the lake water systems and additionally, the FP system was included in the scope.
Plant Mod M-53 was designed and installed in 1988-89 to treat WS/SX, CW, FP, WM, and WD systems.
Again, because of a number of hardware and design deficiencies, the system failed to-deliver Sodium Hypochlorite (liquid chlorine) at the desired time and locations.
Currently, only a small portion of the M-53 modification is being used to treat the Potable Water (WD) system.
The remaining portion stands unutilized and is not released for operation.
In July, 1989, Generic Letter (GL) 89-13 was issued by the NRC which addressed the following:
For open-cycle service water systems, implement and maintain an ongoing program of surveillance and control techniques to significantly reduce the incidence of flow blockage as a result of biofouling.
Conduct a test program to verify heat transfer capability of all safety related heat exchangers cooled by service water.
Ensure by establishing a routine inspection ar.d maintenance program for open-cycle service water system piping and components that corrosion, erosion, protective coating-failure, silting and biofouling cannot degrade the performance of the safety related systems supplied by the service water.
Confirm that the service water system shall perform its intended function in accordance with the licensing basis of the plant.
Confirm that maintenance practices, operating and emergency procedures and training are adequate to ensure.that safety related equipment will function as intended and.that operators of the equipment will perform effectively.
3 RWTP
Rev.
O provides a chronological pictorial representation of the history.
Actions Taken to DAt;.2 At CPS, the following actions have been taken to address raw water treatment and GL 89-13 1.
Performance testing is currently being performed on the SX system heat exchangers per CPS operating procedure 2602.01.
2.
Screenhouse intake structure is inspected during every outage per CPS operating procedure 2400.01.
3.
Between January 1990 and March 1991, forty (40) heat exchangers (HX's) in the SX system were inspected.
There was no evidence of MIC ir. the tube bundles of 35 HX's.
However, a mild att.Ok of MIC in the waterboxes and connected piping $?as noted in SX system.
The MIC was removed by hand cleaning prior to restoring the 1
HX's.
Five Diesel Generator Heat Exchangers (DGHX's) had evidence of MIC attack in their tube bundles and corrective-actions were taken as shown below.
Rework - Because of various leaks which developed and degradation found upon inspection, rework was performed on the DGHX's which consisted of the following actions.
Diesel Plugged MX Tdje Bundle O lvl. it.wi teskina NW tutes Petubed NX eccleeed i
12/89 (16 cyl) 3/90 (12/16 cyl) 9/91 (12/16 cyl)(1) 11(2) 1/90 (12 cyl) 6/90 (12/16 cyl) 9/91 (12/16 cyl) 111(3)
W/A N/A N/A l
Notes (I)12/16 Cyt. Indicates the MX located on the 12 or 16 cylinder head of l
the diesel generator.
l (2) Performed closed Loop chemical treatment which was determined to be I
necessary to kill MIC in Div. It MX's in 3/90.
(33MX was inspected and edfy current tested in 1/90 and 12/90.
Chemical Treatments - A chemical treatment program was developed in conjunction with Buckman Laboratories to inactivate the MIC which was found to be the cause of the failures noted in " Rework" above.
As of this date, threa chemical treatments l
have been completed per CPS operating procedure l
2800.37 in each division of the SX system as shown below.
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CHEMICAL TRFATMENT SX Division First Second Third I
10-11-90 05-29-91 02-26-92 II 10-02-90 08-13-91 02-14-92 III 10-02-90 08-07-91 02-19-92 D311gn chance - To help ensure the long-term reliability of the DGHX's, the following actions have been taken in the design area.
As of this date, they are not yet field implemented.
' Field Alt DGF047:
Facilitates chemical layup of the heat exchangers when not in use.
- Field Alt DGF041:
Allows procurement of a heat exchanger with an alternate tube material.
A new heat exchanger with titanium tubes and titanium clad tubesheets will be procured for the diesel generator application.
Preventive Mempur33 - To prevent stagnant flow conditions in the warm environment of the diesel l'
generator area, started establishing 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> / day flow through the DGHX's tubes beginning in October, 1991.
In order to ensure ef fecti'.eness of the chemical tr'eatments, an inspection program of the SX system heat exchangers was initiated in the third quarter of 1991.
Two heat exchangers, which are picked randomly, are apened and inspected every six months.
As of this date, four heat exchangers have been inspected under this program.and MIC has not been identified in the tube bundles.
Inspection of the next two heat exchangers is. scheduled in June, 1992.
5.
A parallel HX inspection program was executed for the ncn-safety related Plant Service Water (WS) system between March, 1990 and November, 1991.
Out of a total of 28 HX's, 26 have been inspected with no evidence of MIC in the tube bundles.
It should be noted that there was moderate to heavy MIC attack in the waterboxes and.
connected piping in WS system HX's.
The MIC was removed by hand cleaning prior to restoring the HX's.
6.
In the CW system, the main condanser waterboxes are routinely inspected during every planned and refueling outage.
MIC has not been found so far in these waterboxes during at least seven inspections.
The waterbox inspection will continue in future outages.
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0 7.
Three locations of galvanized piping were inspected in FP system.
There was no evidence of MIC ac these locations.
Additional locations with carbon steel piping are planned to be opened and inspected.
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The watar supply to potable water (WD) system is from WS via WM system.
WD system is currently being
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chlorinated per Plant Mod M-53, Supplements 3 and 4.
One of the goals of this program is to estab)ish a reliable source (surfac or ground water) for WD system.
la order to address Laduced heat transfer capability of i
%he main condenser, installed a temporary modification tn June, 1991,.to inject a scale inhibitor in CW system to prevent further scale build-up in the condenser tubes.
2 10, Initiated developmaat of plans for routine chlorination of MS and CW systems after the RF-3 outage.
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b-92A11 The fo'_ lowing six goals have been established in support of the mission:
1.
Inactivate / kill existing microbiologically influenced /
induced corrosion (MTC) in susceptible areas of all the syster.N which utilit. lake water.
2 Estab2 inaf,inplement meth'd(s) to prevent MIC from recurring.
3.
Collec and analyze the lake water data to support
. selection of proper treatment systems which will mitigate effects of general corrosion, scaling, micro and macrobiological fouling.
4.
Design, implement and test permanent raw water G
treatment tysteus.
5.
Develop plans to retire / abandon unutilized portion of installed Plant Mod M-53 (liquid chlorine).
6..
Establish / implement planfn for a reliable source of potable water 1 VI.
Reculatory twterface and Comp.liance During the planning, design and executir of program activities, interface with the following regulatory and rulemaking organizations will be established and compliance ensureT:
6 RWTP
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0 Nuclear Pe ulatory Commission (NRC)
The NRC has issued Generic Letter 89 (GL 89-13) which deals with numerous ways in which water used as a cooling medium can degrade the ability of the safety
.related Service Water system.
This program will ensure compliance with the NRC GL 89-13 recommendations.
Environmental Protection Agency (EPA):
State and Federal Tllinois EPA epprove? the ch=eic51 traetrante with regard to discharge concentrations which can be released to the lake.
It maintains IP's National Pollutant Discharge Elimination System (HPDES) permit.
This program will ensure that all the dischargo concentrations c,e -ithin the permit requiremente.
Illinois Department of Public Health (IDPH)
Currently, lako water supplies the site potable water which must comply with the Federal and State EPA requirements of drinking water quality.
IDPH is responsible for enforcing IEPA rules.
This program will ensure compliance with the potable water standards.
Occupational Safety and Health Administration (OSHA)
Corrosion of piping systems could result in through wall failure (s) of pressurized piping systems thereby endangering plant personnel.
One of the objectives of this program is to develop and implement measures to ensure-that the corrosion which occurs at CPS is kept to a minimuc to help reduce the probability of these types of failures.
National Fire Protection Association (NFPA)
The F. ire Protection system utilizes lake water as its supply.
If left untreated, the water in the system can degrade the system to the point that adequate water flow could not be supplied when required.
One of the objectives of this program is to preven'. this from occurring at CPS.
American Society of Mechanical Engineers (ASME) Code The modifications in the safety related portion of the raw water systems will comply with the ASME Code and non-safety related will comply with B31.1 Code.
7 RWTP
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VII. PIpgIJun Orcanization On January 27, L J2, a full-time Project Manager, K.
.Bhayana, was assigned-to the Raw Water Treatment &
Enhancement Program, reporting to H. T.
Kerestes, Director -
Engineering Projects.
Prior to this time, various group; in Nuclear Station Engineering Department (NSED) were responsible for inactivation and prevention of MIC, Raw Water Treatment Program, Plant Mod M-53 and Potable Water.
Consolidation of all these activities in one program providou a centralized focus and more effective execution of-p3-nned activities.- A Task Fvrce has been 7rmed to support the Project Manager and provide a contact ps nt in each affected discipline to coordinate assigned duties.
The Task Force currently consists of the following:
_ Nuclear Station Engineering Department (NSED)
Design & Analysis Systems Plant Technical (P. Tech.)
Chemistry Testing Radwaste Environmental Affairs Department (EAD)
Licensing & Safety (L&S)
Nuclear Training _ Department (NTD)
In_ addition, an independent water management consultant will be dedicated for three months on this project.
As the need for more support arises, additional disciplines will be added to the Tan? Force.
The Program Support Organization is presented in Attachment 2 VIII. Stratsay It is critical to address each goal of this-program witn a systematic and prioritized approach..The following strategy has been developed to cover the entire program.
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0 GOAL #1 Inactivate Existina MIC Purposo Arrest and inactivate existing MIC in all susceptible areas of the plant systems - SX, WS, CW, FP, WM and WD.
Background:
The first incident of MIC was identified in December, 1989 when DG Div. 1 heat exchanger developed a tube leak.
Follow-up_ inspection of Div. II and III heat exchangers also indicated a MIC related problem.
In the same tire frame, corrective actions were being proposed to address Generic _ Letter 89-13 at CPS.
As a result, an extensive heat exchanger inspection program was started in the safety related SX system and non-safety related WS system.
Open and closed loop chc.nical treatments were performed in the system piping and components.
In order to accomplish this goal, the following actions are planned.
Actions
- 1.
Obtain IEPA discharge permit for SX System chemical treatment on a monthly basis.
The treatment shall be performed in accordance with CPS 2800.37 using Sodium Hypochlorite, Sodium Bromide (BULAB 6040) and a penetrant (BULAB 8007). -These chemicals are neutralized per IEPA permit limits prior to discharging in the lake.
Chemical treatment on a monthly frequency is required to inactivate the existing MIC.
2.
Develop and implement the necessary hardware and software changes to perform chemical treatments in a safe and practical mannet This may result in installation of automatsd dechlorination systems and procurement of portable skids with: pumps and tubing installed for chemical injection.
3.
Conduct monthly chemical treatments in the SX system beginning within two months after-RF-3.
4.
Develop chemical and/or mechanical treatment plans for WS, CW, FP, WM and WD systems.
5.
Obtain IEPA permit for treating WS, CW, FP,
WM and WD systems.
6.
Develop and implement neceesary hardware and software ch".ges similar to Action 2.
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O GOAL #1 (Cont'd) a 7.
Develop-a time-frame to begin chemical treatment in WS, CW, FP, WM and WD systems.
8.
Monitor the effectiveness of chemical treatments on a regular basis using swab culture or-an alternate technique.
I i.
l 10 RWTP
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O GOAL #2 Prevent MIC From Recurrina Purposet Prevent further degradation of the plant systems by preventing MIC from recurring.
Background
Diesel Generator (DG) Div. I and II HX's were retubed in March and June, 1990.
The tube bundles of these HX's were replaced again in September, 1991 due to MIC attack.
The duration between the first and second chemical treatments was approximately 7 months and 10 months in Div.
I and II respectively compared to the recommended frequency of 4 months.
It is therefore, very important to continue the chemical treatment on a regular basis to prevent MIC from recurring.
Actions:
1.
Establish a frequency of chemical and/or mechanical treatment in SX, WS, FP, CW, WM and WD systems which prevents MIC from recurring.
2.
Conduct routine treatments.
3.
Monitor the effectiveness of these treatments on a regular basis.
4.
Evaluate alternate chemicals (e.g.,
only l
liquid chlorine) in place of a combination of chemicals to prevent MIC from recurring.
5.
In the post RF-3 diesel generator outages, inspect DGHX's to evaluate the effect of establishing daily flow.
Develop a similar l
plan for other HX's in tne SX and WS systems, if applicable.
6.
Develop a modification to place the components in chemical layup when not in use.
The potential candidates are the components with warm environment-and stagnant flow conditions.
i 7.
Perform technical and economic evaluation of an alternate tube material for heat exchangers susceptible to MIC attack.
8.
Evaluate establishing continuous flow through SX system to prevent stagnant flow conditions in DGHX's in summer and chemical layup in winter.
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0 GOAL #2 (Cont'd) 9.
Evaluate use of mechanical scrapers and hydrolasing.to reduce potential of MIC.
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h Rev.
O GOAL #3 Analysis / Data Collection to Support Decision on_ Final Treatment Purposet Collect and analyze the lake water data to support selection of treatment systems which will mitigate the effects of general corrosion, scaling, microbiological (algae, slime, bacteria) and macrobiological (Asiatic clams and zebra mussels) in the plant systems and intake / discharge structures.
Backgroundt During RF-3, over 70 tons of calcium carbonate scale was removed from the main condense: tubes.
- Also, during the RF-3 inspection of the scree'ahouse intake structures, an Asiatic clam popula icn af approximately 5,000/sq. ft. was found.
Zebra mussels are moving in the Illinois rivers and are expected to be in Clinton lake in the near future.
The key to determining any treatment program is identification of problem mechanism.
Once the mechanism is identified, a treatment scheme can be developed to arrest that mechanism without creating a new mechanism.
The following actions will accomplish this goal.
Actions:
1.-
Install a leased mobile lab to measure corrosion rater (both coupons and corrators) for system metal (mild carbon steel, copper-nickel, stainless steel), pH, conductivity, chlorine levels, biofouling, fouling factors and deposition on a continucus basis.
This data will be utilized to select proper chemicals, determine materital cnanges and will provide an input to the permanent treatment design.
2.
Install monitors for the size, population and propagation of asiatic clams and zebra mussels in Clinton Lake.
Utilize this data in the design of permanent treatment system.
3.
Evaluate installation of "model condensers" at.the entrance and exit locations of the main condenser to determine the effectiveness of scale inhibitor and chlorination.
L 13 RWTP
Rev.
O GOAL #4 Design, Implement and Test Permanent Raw Water Treetment Systopp Purposes Design and implement a permanent chemical and/or nechanical treatment system in SX, WS, CW, FP, WM and WD systemc which a6 dresses MIC, general corrosion, scale, pitting, micro and macrobiological fouling.
Background:
The key to a successf'11 and effective permanent treatment system is proper selection of treatment methods and chemicals and using thase.on a trial basis prior to the final design.
Paw water treatment is a dynamic process with r
constant enanges in regulatory requirements and treatment technology.
This goal will be accomplished in two phases.
Phase I:
Implementation of trial treatments Phast II: Implementation of permanent treatments The follocing actions are planned for this goal.
Actions:
1.
Retain services of an independent water management consultant with the following four specific tasks:
Task #1:
Perform a comprehensive review and analyze existing data for determination of raw water treatment needs.
Task #2:
Recommendation 2or additional data collection to complete ane'ysis of treatment requirements.
Task #3:
Evaluate existing treatment-programs and recommend viable c'
alternative treatment programs.
Task #4:
Recommena additional treatment programs which are required to support the Program missicn but do not currently exist at CPS.
Prepare a final report providing details of the recommended and alternative treatment programs along with a monitoring plan to ensure effectiveness of the treatment.
Identify advantages and disadvantages of each treatment schemes.
1 14 l
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0 GOAL #4 (Cont'd) 2..
Evaluate use of scale inhibitor in CW system-to prevent scale build-up in the main condenser tubes.
3.
Review water management consultant's final
-recommendation for treatment systems.
4.
Develop a permanent treatment plan.
5.
Obtain necessary discharge permits from IEPA.
Lease skids from the chemical treatment suppliers.
6.
Perform treatments on a trial basis in various systems.
This will facilitate the earliest treatment of corrosion and fouling problems with minimum impact on site personnel and establish effectivenass of chemicals prior to major capital expenditures.
7.
Conduct routine treatments.
8.
Monitor the-effectiveness of these treatments.
9.
Make necessary changes in the chemicals being utilized.
10.
Following successful trial chemical treatments, develop and implement the modifications' required to make the treatment system permanent.
This includes design, permits, new building for the. treatment system, hardware installation, CPS procedures, testing and successful operation.
15
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0 GOAL #5 Closure Plia for Plant Mod M-53 Purpose Retire / abandon portion (s) of Plant Modification M-53 which is currently not being utilized and has no future application at CPS.
Backgrounds Plant Vod M-53 was designed and installed in 1988-1989 to treat lake water in the WS, CW, FP systems in the Screenhouse; and WM and WD systems in the Makeup Water Pump House using Sodium Hypochlorite (liquid chlorine).
Due to various inadequate design considerations and hardware problems such as material incompatibility, gas generation, pump binding, insufficient capacity of metering pumps and deterioration of fittings, a major portion of-this modification was not released for operation.
In order to correct deficiencies in the original design, four supplements ' vere prepared.
The design documents for the entire modification are shown below:
l MgdificatiQn No. of Desian Documents l
M-53 15 Supplement #1 49 Supplement #2 13 Supplement #3 5
Supplement #4 1
All these design documents have generated numerous new support drawings, P&ID's, equipment and structtiral drawings.
Cur.rently, only Supplements 3 and 4 are.being utilized to
. treat Potable Water (WD) system.
The remaining documents are open and associated hardwate unutilized.
Actions:
1.
Review weter management consultant's final recommendatiott for. chemical treatment.
2.
Develop a closure plan to retire / abandon or complete removal of Mod M-53 hardware.
3.
Implement the plan during the installation of a permanent treatment system (s).
16 RWTP
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0 GOAL #6 Beljable Source of Potable (WD) Water
Purpose:
Provide a continuous, safe and disinfected supply of potable water at CPS.
Background:
The Safe Drinking Water Act was passed by Congress in 1974 and has been amended several times since then.
The EPA is the federal government agency which writes the regulations to carry out the provisions of the Act.
The purpum of the Act is to make sure that the potable water supplied to the public is safe and wholesome.
This federal drinking water program is designed to be delegated to the approved state government acencies to ensure compliance on a day-to-day basis.
In Illincis stata, it is the Illinois Department of Public Health (IDPH).
4
. Potable Water Standards:
EPA sets the following standards:
Primary - health based and are enforceable Secondary - esthetic quality (tante, odor or color) based and are non-enforceable Requirements of the Safe Drinking Act:
Sampling and Reporting -- Lab camples are submit ed to c
the agency Record Keeping - Lab results, sample points, location and other information are kept in files r
Public Notitication - Violations are Tier 1 or Tier 2 depending on the seriousness of violations Types of Contaminants:
EPA sets u.c standards for the fellowing groups of contaminants.
Microorganisms - bacterin, viruses and protozoa Turbidity - a measure of the cloudiness of water caused by suspended material Legionella - Heterotrophic bacteria Inorganics - Metals - such as arsenic, barium, cadmium, chromium, fluoride, mercury, nitrate, silver and lead 17 RWTP
Rnv.
O GOAL #6 (Cont'd)
Synthetic organics - Man-made carbon containing chemicals (currently regulated are posticides and herbiciden)
Volatile Organics - These readily volatilize or travel from water into the air Radionuclides - Naturally occurring radioactive chemicals
-Disinfection By-products - Chemicals formed when a disinfectant such as chlorine is added to the water containing organic matter l
Surface water systems obtain their water from sources open to-the atmosphere, such as rivers, lakes, reservoirs and i
streams.
Ground water systems under the influence of L
surface water may include shallow wells, infiltration galleries and springs which have water quality characteristics similar to surface waters.
All surface and ground water systems must provide disinfect 4.on.
Systems will be required to monitor the disinfectant residual leaving the. treatment plant at various points in the distribution system.
The water leaving the treatment plant must have at least 0.2 mg/L of the disinfectant, and the samples taken in the distribution system must have a detectable re: '. dual.
Certain guidelines must be followed to ensure that there is enough contact time I
between the disinfectant and-the water so that the microorganisms are inactivated.
The current source of potable water (WD) is from WS through WM. system.
Use of certain chemicals (e.g., bromine) are
-prohibited in potable water.
The chemical selection for the Raw Water Treatment and Enhancement Program will dictate the selection of a permanent source of potable water.
Actions:
1.
Select ground water source location.
2.
Perform well drilling, if required.
3.
Evaluate quality of gtound water.
4.
Make final selection of reliable source -
ground water vs. surface water.
5.
Prepare final design for implementation.
L 18 RWTP
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,_Q_,
- IX. -
Performance Indicatorg
- Performance of the overall project will be reflected on
.performanceLindicators which are being developed.
These p
formance indicators will be based on the Level II schedule and will be updated on a monthly basis to ref]ect actuc. progress against the overall schedule and mission.
X; Ag.hgjLuis A Level I_schedole is proviled as Attachment 3 which lays out six; major goals for--the-Raw Water Treatment and Enhancement: Program.
A Leve II schedule with applicable-t'J details is currently being develrred.
This plan will be adjusted as more axperience and knowledge is gained' pertaining to lake water chemistry, chemicals,-
environmental. restrictions,-treatmentLtechnology, regulatory
.requ remen s and. costs.
At the completion of this program, all i
t modifications will have been released for operation.following L
satisfactoryfpost mod-testing.
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19 RWTP
Rev. O RAW WATER TREATEMENT AND ENHANCEMENT PROGRAM HISTORY ORIGINAL PLANT DESIGN
- Traveling Screens
- Pump Stralners
- Gaseous Chlorination for WS/SX,0W,WM,WD a
3983 sees..................
3eee..................
in Dedaions to eliminate 01toftne gas from CPS and utlaze 3ser..................
iiqud cnonne for wstsx,FP.CW,WM,WD Systene 3938..................
JufY December 3ges..................
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laleeued bytheNRC -
Diagncaed as VIC Etsck
' Generic Letter f,415 accone begin
' Ptant Mod M.53 ptspJed W:n design detidendee 3 ggo..................
- EPR studaa lndices reduced effectivenees of liquid cfilcr,t a ln water Wth pH value of 80 and above
' Contnued eff crts to maka Plant Mod M 53 funcdonal 3 ggt
'Inlection of St.eleinhibitor in CW System January Maren
'onif etableWater
' Project #enager named
' RF.31necection ef P
1992 --- - -- - - --
dn W RWh Mm sumemen is rolessed for Cpe and Enhais;rnent Program finds cense populacon (E000
!J Init!sted per eqtt.) of Matic Cems 1
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__.......__3.________.___............
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j NUCLEAR UCENSING CONTRACT NSED ADMINI-CPS TRAINING SAFETY STRATION 3
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PROCURE-WORK MAINT-SYSTEMS DESIGN EWIRON-PLam PW RADWASTE TENANCE MENT MANAGE-a MENTAL
. CHEMISTRY TESTING MENT AFFAIRS
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