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{{#Wiki_filter:Page Printed: 04/29/09 ACTION REQUEST 00309035 Type : NCR Orig Date: 12/02/08 07:38 Discovery Date: Subject : WATER IN CISTERN BOX AIR RELIEF VLVE#1 COOLING TOWER BLOWDOW Description THE CISTERN BOX SURROUNDING AIR RELIEF VALVE #10F COOLING TOWER BLOWDOWN LINE WAS INSPECTED ON 12/1/08 AT 1300. THE BOX HAD APPROXIMATELY 150 GALLONS OF STANDING WATER. TWO WEEKS PREVIOUS, 11/18/08 THE CONTAINMENT BOX WAS PUMPED OUT AND 150-200 GALLONS OF WATER WAS REMOVED. A SAMPLE WAS PULLED FOR ANALYSIS.
{{#Wiki_filter:3 Page Printed: 04/29/09 ACTION REQUEST         00309035 Type           : NCR       Orig Date: 12/02/08 07:38           Discovery Date:
THE WATER WAS COUNTED TO HNP LOWER LIMIT OF DETECTION AND WAS FOUND TO HAVE <1850 PCI/L OF TRITIUM. COOLING TOWER BLOWDOWN DISCHARGE IS AROUND 3500 PCI/L, THEREFORE THE WATER DOES NOT HAVE THE CHARACTERISTICS OF PLANT EFFLUENT.
Subject         : WATER IN   CISTERN BOX AIR RELIEF VLVE#1           COOLING TOWER BLOWDOW Description THE CISTERN BOX SURROUNDING AIR RELIEF VALVE #10F COOLING TOWER BLOWDOWN LINE WAS INSPECTED ON 12/1/08 AT 1300.                     THE BOX HAD APPROXIMATELY         150 GALLONS     OF STANDING WATER.     TWO WEEKS PREVIOUS,         11/18/08 THE CONTAINMENT BOX WAS PUMPED OUT AND 150-200       GALLONS OF WATER WAS REMOVED.           A SAMPLE WAS PULLED FOR ANALYSIS.           THE WATER WAS COUNTED TO HNP LOWER LIMIT OF DETECTION AND WAS FOUND TO HAVE <1850                   PCI/L OF TRITIUM. COOLING TOWER BLOWDOWN DISCHARGE             IS AROUND 3500 PCI/L,     THEREFORE THE WATER DOES NOT HAVE THE CHARACTERISTICS         OF PLANT EFFLUENT.         THE SAMPLE WAS   SENT TO THE HEEC TO BE ANALYZED TO THE ENVIRONMENTAL                   LOWER LIMIT FROM TRITIUM OF 250         PCI/L.
THE SAMPLE WAS SENT TO THE HEEC TO BE ANALYZED TO THE ENVIRONMENTAL LOWER LIMIT FROM TRITIUM OF 250 PCI/L.Priority : 2 Report To : Status: APPROVED 12/04/08 Due Date : 12/03/09 Event Date Originator
Priority         : 2             Report To             :               Status:   APPROVED 12/04/08 Due Date         : 12/03/09       Event Date Originator       : BAXTEH         Originator     Group:
: BAXTEH Originator Group: Facility : HNP Department 1: I75 Organization:
Facility         : HNP           Department               I75 1:           Organization:
owed To : Owed To Group : CHUEVAL Owed To Fac: HNP Department
owed To         :               Owed To Group         : CHUEVAL Owed To Fac: HNP                 Department             :               Discipline AR Status     History Updated Date         Updated By       AR Status     AR Due Date 12/02/08             BAXTEH             INPROG 12/02/08             BAXTEH             H/APPR 12/04/08             FURRJA                           12/03/09 12/04/08             FURRJA             PRE-APRV 12/04/08             FURRJA             APPROVED A
: Discipline AR Status History Updated Date Updated By AR Status AR Due Date 12/02/08 BAXTEH INPROG 12/02/08 BAXTEH H/APPR 12/04/08 FURRJA 12/03/09 12/04/08 FURRJA PRE-APRV 12/04/08 FURRJA APPROVED 3 A (>1 ATTACHMENT 3 Sheet 1 of 2 ADVERSE CONDITION INVESTIGATION FORM Form CAP-NGGC-0200-3-18 Action Request Number: 309035 Investigator:
(>1
Heather Baxter 1. Adverse Condition Description The cistern box surrounding air relief valve #1 of cooling tower blowdown line was inspected on 12/1/08 at 1300. The box had approximately 150 gallons of standing water. Two weeks previous, 11/18/08 the containment box was pumped out and 150-200 gallons of water was removed. A sample was pulled for analysis.
 
The water was counted to HNP lower limit of detection and was found to have <1850 pCi/L of tritium. Cooling Tower Blowdown discharge is around 3500 pCi/L, therefore the water does not have the characteristics of plant effluent.
ATTACHMENT 3 Sheet 1 of 2 ADVERSE CONDITION INVESTIGATION FORM Form CAP-NGGC-0200-3-18 Action Request Number: 309035                               Investigator:   Heather Baxter
The sample was analyzed by the HEEC and found to contain 735 pCi/L+/- 155 pCi/L. This is less than the 20,000 pCi/L reporting criteria, therefore the sample is not reportable.
: 1. Adverse Condition Description The cistern box surrounding air relief valve #1 of cooling tower blowdown line was inspected on 12/1/08 at 1300. The box had approximately 150 gallons of standing water. Two weeks previous, 11/18/08 the containment box was pumped out and 150-200 gallons of water was removed. A sample was pulled for analysis. The water was counted to HNP lower limit of detection and was found to have <1850 pCi/L of tritium. Cooling Tower Blowdown discharge is around 3500 pCi/L, therefore the water does not have the characteristics of plant effluent. The sample was analyzed by the HEEC and found to contain 735 pCi/L
: 2. Investigation Summary" What Should Be: o The Cooling Tower Blowdown Air Relief Valve cistern boxes should be devoid of standing water.o The groundwater along the Cooling Tower Blowdown line cannot have detectible tritium.* What Is: o The cistern box surrounding the air relief valve #1 has historically filled with groundwater.
      +/- 155 pCi/L. This is less than the 20,000 pCi/L reporting criteria, therefore the sample is not reportable.
The water level inside the box rises and falls depending upon weather conditions.
: 2. Investigation Summary
o Several repeat samples of the groundwater in the cistern have shown about 800 pCi/L +/- 155 pCi/L of tritium.* How it happened: o On 12/16/08 the cistern box was pumped out a second time and 225 gallons of water was removed. During the pump out, groundwater flowed into the cistern via a drain pipe hole located on the floor of the cistern.o A sample of the water from the drain pipe contained 850 pCi/L +/- 155 pCi/L of tritium.* The inappropriate act or equipment malfunction.
    " What Should Be:
o The cistern box drain is designed to drain water from the cistern to the surrounding ground to prevent standing water from accumulating around the air relief valve stem. The hydraulic pressure from the surrounding water table causes groundwater to backflow into the cistern.o An unknown source of tritium is contaminating the groundwater surrounding the air relief valve#1 cistern box.* Why happened.o The Cooling Tower Blowdown line is a 4 foot fiberglass line that is buried underground.
o The Cooling Tower Blowdown Air Relief Valve cistern boxes should be devoid of standing water.
It travels from the discharge weir at the base of the Cooling Tower to the discharge point near Harris Lake Spillway.
o The groundwater along the Cooling Tower Blowdown line cannot have detectible tritium.
In order to prevent air binding of the line, a series of air relief valves and manholes are placed along the length of the pipe. During plant construction, the pipe was buried several feet underground.
* What Is:
The air relief valves were placed inside of large underground cisterns to provide easy access.According to plant construction diagrams, the Cooling .Tower Blowdown pipe was placed upon a bed of gravel and backfilled with soil. At the bottom of each cistern was a small drain, which drains to the surrounding gravel. During the pump out on 12/16/08 it was observed that water was flowing into the cistern from the drain hole at a rate of about 0.5 L/min.
o The cistern box surrounding the air relief valve #1 has historically filled with groundwater. The water level inside the box rises and falls depending upon weather conditions.
o As part of the site's Radiological Environmental Monitoring Program (REMP) the HNP Environmental Groundwater Monitoring Program utilizes on-site deep wells to. monitor the tritium concentration of the groundwater.
o Several repeat samples of the groundwater in the cistern have shown about 800 pCi/L +/- 155 pCi/L of tritium.
The typical lower level of detection for tritium in groundwater samples is 250 pCi/L. Historically the site's monitoring wells have all been less than detectible
* How it happened:
(<LLD) for tritium. The water inside of the cistern was sampled and analyzed at the environmental lower limit of detection.
o On 12/16/08 the cistern box was pumped out a second time and 225 gallons of water was removed. During the pump out, groundwater flowed into the cistern via a drain pipe hole located on the floor of the cistern.
The table below shows the results: Tritium (pCi/L)(+/-155 pCi/L)9/15/08 747 10/15/08 878 12/1/08 735 12/16/08 850 Even after the cistern is pumped out or rainfall events, the concentration of tritium within the cistern is within the error associated with the measurement.
o A sample of the water from the drain pipe contained 850 pCi/L +/- 155 pCi/L of tritium.
Therefore, the groundwater surrounding the cistern is contaminated with 800 pCi/L of tritium.The pipe carries plant liquid releases to Harris Lake for discharge.
* The inappropriate act or equipment malfunction.
Because of the reuse of Harris Lake, the concentration of tritium in the blowdown effluent is approximately 4000-5000 pCi/L. This concentration varies due to release tanks, concentration of lake tritium, and rainfall.In addition, the concentration of Harris Lake itself ranges from 3000 -9000 pCi/L. At this point it is difficult to say where the tritium in the groundwater is coming from. It is possible that the tritium in the lake is impacting the groundwater surrounding the Cooling Tower Blowdown line or the Cooling Tower Blowdown line has a leak which is releasing blowdown effluent into the groundwater.
o The cistern box drain is designed to drain water from the cistern to the surrounding ground to prevent standing water from accumulating around the air relief valve stem. The hydraulic pressure from the surrounding water table causes groundwater to backflow into the cistern.
Further investigation will be required to determine the source of the tritium in the groundwater.
o An unknown source of tritium is contaminating the groundwater surrounding the air relief valve
                #1 cistern box.
* Why happened.
o   The Cooling Tower Blowdown line is a 4 foot fiberglass line that is buried underground. It travels from the discharge weir at the base of the Cooling Tower to the discharge point near Harris Lake Spillway. In order to prevent air binding of the line, a series of air relief valves and manholes are placed along the length of the pipe. During plant construction, the pipe was buried several feet underground. The air relief valves were placed inside of large underground cisterns to provide easy access.
According to plant construction diagrams, the Cooling .Tower Blowdown pipe was placed upon a bed of gravel and backfilled with soil. At the bottom of each cistern was a small drain, which drains to the surrounding gravel. During the pump out on 12/16/08 it was observed that water was flowing into the cistern from the drain hole at a rate of about 0.5 L/min.
 
o   As part of the site's Radiological Environmental Monitoring Program (REMP) the HNP Environmental Groundwater Monitoring Program utilizes on-site deep wells to. monitor the tritium concentration of the groundwater. The typical lower level of detection for tritium in groundwater samples is 250 pCi/L. Historically the site's monitoring wells have all been less than detectible
(<LLD) for tritium. The water inside of the cistern was sampled and analyzed at the environmental lower limit of detection. The table below shows the results:
Tritium (pCi/L)
(+/-155 pCi/L) 9/15/08                 747 10/15/08               878 12/1/08                 735 12/16/08               850 Even after the cistern is pumped out or rainfall events, the concentration of tritium within the cistern is within the error associated with the measurement. Therefore, the groundwater surrounding the cistern is contaminated with 800 pCi/L of tritium.
The pipe carries plant liquid releases to Harris Lake for discharge. Because of the reuse of Harris Lake, the concentration of tritium in the blowdown effluent is approximately 4000-5000 pCi/L. This concentration varies due to release tanks, concentration of lake tritium, and rainfall.
In addition, the concentration of Harris Lake itself ranges from 3000 - 9000 pCi/L. At this point it is difficult to say where the tritium in the groundwater is coming from. It is possible that the tritium in the lake is impacting the groundwater surrounding the Cooling Tower Blowdown line or the Cooling Tower Blowdown line has a leak which is releasing blowdown effluent into the groundwater. Further investigation will be required to determine the source of the tritium in the groundwater.
An action plan will need to be developed to identify the source of the tritium in the groundwater, as well as, the remediation protocol to prevent migration of licensed material off-site and to minimize decommissioning impacts.
An action plan will need to be developed to identify the source of the tritium in the groundwater, as well as, the remediation protocol to prevent migration of licensed material off-site and to minimize decommissioning impacts.
DESCRIPTION CAUSE COD ORG CORRECTIVE ASSIGNMENT ASSIGNEE/
 
DUE OR E ACTION TYPE CONCURREN COMPLETIO CE N DATE**ADVERSE 800 pCi/L of Pump out the water CORR Larry Garner Complete CONDITION tritium was N/A NIA N/A in the cistern box discovered in and dispose of the the Cooling water appropriately Tower Air Relief cistern Develop and CORR Heather 4/15/09 implement Action Baxter Plan for tritium source I/A Detectible (Apparent)
DESCRIPTION     CAUSE             COD ORG   CORRECTIVE         ASSIGNMENT ASSIGNEE/   DUE OR E         ACTION             TYPE       CONCURREN   COMPLETIO CE           N DATE**
J7U N/A See corrective NA NA NA concentration of The Cooling Tower action above for tritium found in Blowdown line may adverse condition water be leaking blowdown effluent OTHER Document in the ENHN Heather 6/1/09 N/A N/A N/A NIA 2008 ARERR Baxter report the groundwater cister results J:\Shared\Cause Codes\CAP Cause Codes.doc Page 10 Printed: 04/29/09 ACTION REQUEST 00309035 ASSIGNMENT NUMBER05 SUB Type : CORR Due Date : 07/16/09 Status : NTFY/ASG Reschedule
ADVERSE   800 pCi/L of                                   Pump out the water CORR       Larry Garner Complete CONDITION tritium was               N/A       NIA N/A   in the cistern box discovered in                                 and dispose of the the Cooling                                   water appropriately Tower Air Relief cistern Develop and         CORR       Heather     4/15/09 implement Action               Baxter Plan for tritium source I/A       Detectible       (Apparent)       J7U N/A   See corrective     NA         NA           NA concentration of The Cooling Tower           action above for tritium found in Blowdown line may           adverse condition water             be leaking blowdown effluent OTHER                                                   Document in the     ENHN       Heather       6/1/09 N/A               N/A       N/A   NIA 2008 ARERR                     Baxter report the groundwater cister results J:\Shared\Cause Codes\CAP Cause Codes.doc
: 1 Pri Resp Group: ERCCSUPT Assigned To : H BAXTER Sec Resp Group: Subject : CORR-DEVELOP AND IMPLEMENT ACTION PLAN FOR TRITIUM SOURC Aff Facility:
 
HNP Unit : System UCR Schedule Ref Organization:
Page       10 Printed: 04/29/09 ACTION REQUEST   00309035 ASSIGNMENT NUMBER05     SUB Type         : CORR         Due Date         : 07/16/09 Status       : NTFY/ASG     Reschedule       : 1           Pri Resp Group: ERCCSUPT Assigned To : H BAXTER                                       Sec Resp Group:
Department
Subject       : CORR-DEVELOP AND IMPLEMENT     ACTION PLAN FOR TRITIUM SOURC Aff Facility: HNP           Unit             :             System UCR                         Schedule Ref Organization:               Department       : 175         Discipline Est Manhrs   :             Est Comp Date Assignment Status History Updated Date     Updated By     Assgn Status     Assgn Due Date 12/02/08         BAXTEH         INPROG 12/31/08         GRUBBT                           04/15/09 12/31/08         GRUBBT         NTFY/PRI 12/31/08         CATTCH         ACC/PRI 12/31/08         CATTCH         NTFY/ASG 04/15/09         FURRJA                           07/16/09 DEVELOP AND IMPLEMENT     ACTION PLAN FOR TRITIUM SOURCE Assignment Attribute     Value                       Reqd Date BENEFIT REALIZED                                     N Name Assignment Attribute     Value                       Reqd Date 1 UNIT/SECT EVALUATR                                 N Name Assignment Attribute     Value                       Reqd Date 1A COMMITTED                                         N Name :
: 175 Discipline Est Manhrs : Est Comp Date Assignment Status History Updated Date Updated By Assgn Status Assgn Due Date 12/02/08 BAXTEH INPROG 12/31/08 GRUBBT 04/15/09 12/31/08 GRUBBT NTFY/PRI 12/31/08 CATTCH ACC/PRI 12/31/08 CATTCH NTFY/ASG 04/15/09 FURRJA 07/16/09 DEVELOP AND IMPLEMENT ACTION PLAN FOR TRITIUM SOURCE Assignment Attribute Value Reqd Date BENEFIT REALIZED N Name Assignment Attribute Value Reqd Date 1 UNIT/SECT EVALUATR N Name Assignment Attribute Value Reqd Date 1A COMMITTED N Name : Assignment Attribute Value Reqd Date lB CHANGE BASIS N Name First extension approved by Supervisor and Licensing/PERAS if NRC committed Additional extensions approved by Unit Manager/Superintendent and Licensing/PERAS if committed Justification should include the following:
Assignment Attribute     Value                       Reqd Date lB CHANGE BASIS                                     N Name First extension approved by Supervisor and Licensing/PERAS if NRC committed Additional extensions approved by Unit Manager/Superintendent and Licensing/PERAS if committed Justification should include the following:
Why the assignment is being extended; to allow implementation of action plan The new due date: 7/16/09 Why the new due date is acceptable from a nuclear safety and risk perspective:
Why the assignment is being extended; to allow implementation of action plan The new due date: 7/16/09 Why the new due date is acceptable from a nuclear safety and risk perspective: No radiological concern since we are dealing with Cooling Tower blow down line.
No radiological concern since we are dealing with Cooling Tower blow down line.Concurrence received from Chris Burton via Mike Robinson on 4/15/09.
Concurrence received from Chris Burton via Mike Robinson on 4/15/09.
Page : ii Printed: 04/29/09 ACTION REQUEST 00309035 Assignment Attribute Value 2 MISCELLANEOUS Name Assignment Attribute Value 2A COMMENTS Name Assignment Attribute Value 2B COMMENTS Name Assignment Attribute Value 2C COMMENTS Name : Assignment Attribute Value 2D COMMENTS Name : Assignment Attribute Value 2E COMMENTS Reqd N Date Reqd N Date Date Reqd N Reqd N Date Reqd N Date Reqd N Name : Date Date Assignment Attribute Value 3A LTCA APPROVAL Name Assignment Attribute Value 3B LTCA CONCURRENCE Name : Reqd N Reqd N Date COMPLETION NOTES CAUSE/ACTION ASSIGNMENT COMPLETION APPROVAL Route List: 001 Route List Initiator:
 
Alert Send Send Action Action PASSPORT Fac Group/Type Last Name Date Time Taken Date/Time HNP ERCCSUPT A HNP CHUEVAL A Develop and implement Action Plan for tritium source HNP Action Plan for Groundwater Protection Program Rev 1 (1/7/09)Developer:
Page   :   ii Printed: 04/29/09 ACTION REQUEST   00309035 Assignment Attribute Value                   Reqd Date 2 MISCELLANEOUS                             N Name Assignment Attribute Value                   Reqd  Date 2A COMMENTS                                 N Name Assignment Attribute Value                   Reqd  Date 2B COMMENTS                                 N Name Assignment Attribute Value                   Reqd  Date 2C COMMENTS                                 N Name :
Heather Baxter, Don Edwards Responsible Supervisor:
Assignment Attribute Value                   Reqd  Date 2D COMMENTS                                 N Name :
Mike Robinson Date Initiated:
Assignment Attribute   Value               Reqd  Date 2E COMMENTS                                 N Name Assignment Attribute Value                   Reqd  Date 3A LTCA APPROVAL                             N Name Assignment Attribute Value                   Reqd  Date 3B LTCA CONCURRENCE                         N Name :
1/5/2009 AR Number: 309035 Section 1 -Define Problem and. Expected Results In accordance with the industry's Groundwater Protection Initiative, Harris Nuclear Plant is required to develop and implement a groundwater protection program to assure timely and effective management of situations involving inadvertent releases of licensed material to the groundwater.
COMPLETION NOTES CAUSE/ACTION ASSIGNMENT COMPLETION APPROVAL Route List: 001                       Route List Initiator:
This action plan will address management, remediation and decommissioning impacts of tritium detected along the Cooling Tower Blowdown Line and the addition of new monitoring wells.Section 2 -Current Facts and Assumptions
Alert                   Send   Send Action           Action PASSPORT Fac Group/Type     Last Name   Date   Time Taken           Date/Time HNP ERCCSUPT   A HNP CHUEVAL     A
* Facts: The water that is flooding the cistern that surrounds the Air Relief Valve #1 of the Cooling Tower Blowdown line contains 800 pCi/L of tritium. Both Harris Lake and the Cooling Tower Blowdown typically contains about 6000 pCi/L tritium. As part of the site's Radiological Environmental Monitoring Program the HNP Environmental Groundwater Monitoring Program utilizes on-site deep wells to monitor the tritium concentration of the groundwater.
 
The typical lower level of detection for tritium in the groundwater samples is 250 pCi/L. Historically the site's monitoring wells have shown less than detectible
Develop and implement Action Plan for tritium source HNP Action Plan for GroundwaterProtectionProgram Rev 1 (1/7/09)
(<250 pCi/L) of tritium. Therefore, the tritium concentration in the groundwater is not naturally occurring.
Developer: Heather Baxter, Don Edwards                   Responsible Supervisor: Mike Robinson Date Initiated: 1/5/2009                               AR Number: 309035 Section 1 -Define Problem and. Expected Results In accordance with the industry's Groundwater Protection Initiative, Harris Nuclear Plant is required to develop and implement a groundwater protection program to assure timely and effective management of situations involving inadvertent releases of licensed material to the groundwater.
There are currently no monitoring wells in the vicinity of the Cooling Tower Blowdown line;therefore the hydrogeological conditions of the site have not been evaluated.
This action plan will address management, remediation and decommissioning impacts of tritium detected along the Cooling Tower Blowdown Line and the addition of new monitoring wells.
Section 2 - Current Facts and Assumptions
* Facts:
The water that is flooding the cistern that surrounds the Air Relief Valve #1 of the Cooling Tower Blowdown line contains 800 pCi/L of tritium. Both Harris Lake and the Cooling Tower Blowdown typically contains about 6000 pCi/L tritium. As part of the site's Radiological Environmental Monitoring Program the HNP Environmental Groundwater Monitoring Program utilizes on-site deep wells to monitor the tritium concentration of the groundwater. The typical lower level of detection for tritium in the groundwater samples is 250 pCi/L. Historically the site's monitoring wells have shown less than detectible (<250 pCi/L) of tritium. Therefore, the tritium concentration in the groundwater is not naturally occurring.
There are currently no monitoring wells in the vicinity of the Cooling Tower Blowdown line; therefore the hydrogeological conditions of the site have not been evaluated.
 
Assumptions:
Assumptions:
Since the source of the tritium in the groundwater surrounding the Cooling Tower Blowdown line is not naturally occurring, it is assumed that the groundwater tritium is either due to a Cooling Tower Blowdown Line leak or Harris Lake influence.
Since the source of the tritium in the groundwater surrounding the Cooling Tower Blowdown line is not naturally occurring, it is assumed that the groundwater tritium is either due to a Cooling Tower Blowdown Line leak or Harris Lake influence.
Section 3 -Define Needed Resources Chemistry  
Section 3 - Define Needed Resources Chemistry -
-1. Manage the Groundwater Protection Program to ensure compliance with all rules and regulations
: 1. Manage the Groundwater Protection Program to ensure compliance with all rules and regulations
: 2. Analyze the groundwater samples for tritium and gamma emitters 3. Make recommendations for remediation
: 2. Analyze the groundwater samples for tritium and gamma emitters
: 4. Document actions associated with this action plan in the site decommissioning 50.75(g) file.5. Analyze soil samples for gamma emitters 6. If blowdown line is found leaking, estimate the leak rate to determine if a leak of licensed material exceeds the NEI 07-07 volumetric criteria for licensed material.Engineering  
: 3. Make recommendations for remediation
-1. Evaluate Cooling Tower Blowdown Line for leaks 2. Evaluate modifying Combined Outfall Sampler pipe to prevent Cooling Tower Blowdown from interacting with groundwater
: 4. Document actions associated with this action plan in the site decommissioning 50.75(g) file.
: 3. Evaluate Cooling Tower Blowdown cistern drain holes Maintenance/Facility  
: 5. Analyze soil samples for gamma emitters
-1. Pump out the water from the cistern and obtain a sediment sample 2. Provide access to the Cooling Tower Blowdown Line site Contract -Silar Services 1. Evaluate the hydrogeologic conditions of the site and determine if there is a potential for water from that location to get off site 2. Install piezometers to measure isoconcentrations of tritium, if needed 3. Evaluate the influence of Harris Lake on the site's groundwater Section 4 -Define the Nuclear or Personnel Safety Impact of the Problem (if applicable)
: 6. If blowdown line is found leaking, estimate the leak rate to determine if a leak of licensed material exceeds the NEI 07-07 volumetric criteria for licensed material.
This problem does not represent a plant nuclear or personnel safety risk. The Groundwater Protection Program was implemented to provide public confidence in the nuclear industry and is enforced by the Nuclear Regulatory Commission.
Engineering -
Even though 800 pCi/L of tritium is significantly below the 20,000 pCi/L of tritium reporting limit, any detectible tritium is a concern to the public. In order to help maintain a good relationship with the surrounding community and stakeholders the site must be proactive and efficiently deal with the problem.
: 1. Evaluate Cooling Tower Blowdown Line for leaks
Section 5 -Action Plan Actiyity Assignee Expected Date of Completion 1 Revise Silar Services contract to provide Charlie Ross/ Mike Complete services to HNP site Robinson 2 Obtain, from Silar Services, an Heather Baxter/ Don Complete 4/1/09 evaluation of the area's hydrogeologic Edwards conditions and possible impact to the public 3 Sample perched water along the Cooling Heather Baxter/ Don Complete 2/5/09 Tower Blowdown Line for tritium Edwards 4 Measure the tritiumconcentration along Heather Baxter/ Don Complete 3/4/09 the blowdown line to help isolate the Edwards possible location of a leak.5 Obtain soil samples from the area and Heather Baxter/ Don Complete 2/5/09 cistern sediment and measure for Edwards gamma emitters 6 Evaluate the remediation required for Heather Baxter/ Don In process 4/1/09 the site Edwards 7 Document decommissioning impacts in Heather Baxter/ Don Once actions (#1-6,11)the plant 50.75(g) file Edwards are complete 8 If a leak is discovered, evaluate the Ryan Welch/ Matt In process impact of the leak upon the Cooling Denny Tower Blowdown system 9 Evaluate the cistern drain and methods Ryan Welch/ Matt In progress to prevent backflow Denny 10 Evaluate the need to modify the drain Ryan Welch/ Matt In process holes in the remaining cisterns Denny ARS 1 has been plugged 11 Evaluate the need to modify the Ryan Welch/ Matt In process Combined Outfall sampler hose Denny penetration and drain hole 12 Identify potential pathways for Heather Baxter/ Don Complete 4/1/09 groundwater migration from cistern to Edwards off-site locations through groundwater 13 If blowdown line is found leaking, Heather Baxter/ Don Complete 4/1/09 estimate the leak rate to determine if a Edwards leak of licensed material exceeds the NEI 07-07 volumetric criteria for licensed material.14 Evaluate the location of new site Heather Baxter/Don Complete 4/1/09 monitoring wells Edwards Section 6 -References
: 2. Evaluate modifying Combined Outfall Sampler pipe to prevent Cooling Tower Blowdown from interacting with groundwater
* NEI 07-07 (Final) -Industry Ground Water Protection Initiative" EPRI -Groundwater Protection Guidelines for Nuclear Power Plants TR 1015118, November 2007 Page : 12 Printed: 04/29/09 ACTION REQUEST 00309035 ASSIGNMENT NUMBER 06 SUB Type : ENHN Due Date 06/01/09 Status : AWAIT/C Reschedule Pri Resp Group: ERCCSUPT Assigned To : H BAXTER Sec Resp Group: Subject : ENHN-DOCUMENT IN THE 2008 ARERR REPORT THE GROUNDWATER CI Aff Facility:
: 3. Evaluate Cooling Tower Blowdown cistern drain holes Maintenance/Facility -
HNP Unit System UCR Schedule Ref Organization:
: 1. Pump out the water from the cistern and obtain a sediment sample
Department
: 2. Provide access to the Cooling Tower Blowdown Line site Contract - Silar Services
: 175 Discipline Est Manhrs : Est Comp Date Assignment Status History Updated Date Updated By Assgn Status Assgn Due Date 01/05/09 GRUBBT INPROG 01/05/09 GRUBBT 06/01/09 01/05/09 GRUBBT NTFY/PRI 01/05/09 CATTCH ACC/PRI 01/05/09 CATTCH NTFY/ASG 04/28/09 BAXTEH ACC/ASG 04/28/09 BAXTEH AWAIT/C DOCUMENT IN THE.2008 ARERR REPORT THE GROUNDWATER CISTERN RESULTS Assignment Attribute Value Reqd Date BENEFIT REALIZED N Name Assignment Attribute Value Reqd Date 1 CHANGE BASIS N Name Assignment Attribute Value Reqd Date 2 COMMENTS N Name : COMPLETION NOTES CAUSE/ACTION ASSIGNMENT COMPLETION APPROVAL Route List: 001 Route List Initiator:
: 1. Evaluate the hydrogeologic conditions of the site and determine if there is a potential for water from that location to get off site
BAXTEH Alert Send Send Action Action PASSPORT Fac Group/Type Last Name Date Time Taken Date/Time ROBINJO2 HNP ERCCSUPT A ROBINSON 04/28/09 01:39 APPROVED 04/28/09 07:27 HNP CHUEVAL A ROBINSON 04/28/09 07:27 Enclosure 5: Groundwater Samples taken in support of Groundwater Protection Initiative NEI 07-07 Industry Groundwater Protection Initiative  
: 2. Install piezometers to measure isoconcentrations of tritium, if needed
-Final Guidance Document, Objective 2.4 Samples were taken at various locations throughout the plant in support of the Groundwater Protection Initiative.
: 3. Evaluate the influence of Harris Lake on the site's groundwater
Samples included the cistern enclosure of the Air Relief Valve for the Cooling Tower Blowdown Line, and Vaults and Yard Drains that may have collapsed and contain water that could potentially affect groundwater.
 
All samples analyzed at HNP showed no detectable tritium activity.
Section 4 - Define the Nuclear or Personnel Safety Impact of the Problem (if applicable)
3out of 6 samples from Cistern #2 analyzed at the Harris E&E Center showed activity less than the LLD value for the Harris Plant. The Harris E&E center analyzes to a lower LLD. An investigation is in process concerning the 3 positive results.TRITIUM MANHOLE DATE (uCi/ml)Cistern #2 1/7/2008 < 1.90E-06 4/2/2008 < 1.98E-06 6/26/2008  
This problem does not represent a plant nuclear or personnel safety risk. The Groundwater Protection Program was implemented to provide public confidence in the nuclear industry and is enforced by the Nuclear Regulatory Commission. Even though 800 pCi/L of tritium is significantly below the 20,000 pCi/L of tritium reporting limit, any detectible tritium is a concern to the public. In order to help maintain a good relationship with the surrounding community and stakeholders the site must be proactive and efficiently deal with the problem.
< 2.22E-06 9/15/2008 8.78E-07 10/15/2008 7.47E-07 12/1/2008 7.35E-07 MH-12 B-SA 3/5/2008 < 1.82E-06 MH-75 7/15/2008  
 
< 1.96E-06 10/7/2008  
Section 5 - Action Plan Actiyity                       Assignee     Expected Date of Completion 1     Revise Silar Services contract to provide Charlie Ross/ Mike         Complete services to HNP site                       Robinson 2     Obtain, from Silar Services, an           Heather Baxter/ Don   Complete 4/1/09 evaluation of the area's hydrogeologic     Edwards conditions and possible impact to the public 3     Sample perched water along the Cooling   Heather Baxter/ Don   Complete 2/5/09 Tower Blowdown Line for tritium           Edwards 4     Measure the tritiumconcentration along   Heather Baxter/ Don   Complete 3/4/09 the blowdown line to help isolate the     Edwards possible location of a leak.
< 1.96E-06 MH-72D-SB 1/26/2008  
5     Obtain soil samples from the area and     Heather Baxter/ Don   Complete 2/5/09 cistern sediment and measure for         Edwards gamma emitters 6     Evaluate the remediation required for     Heather Baxter/ Don   In process 4/1/09 the site                                 Edwards 7     Document decommissioning impacts in       Heather Baxter/ Don Once actions (#1-6,11) the plant 50.75(g) file                   Edwards                 are complete 8     If a leak is discovered, evaluate the     Ryan Welch/ Matt           In process impact of the leak upon the Cooling       Denny Tower Blowdown system 9     Evaluate the cistern drain and methods   Ryan Welch/ Matt         In progress to prevent backflow                       Denny
< 1.87E-06 7/1/2008 < 1.96E-06 8/12/2008  
 
< 1.90E-06 9/22/2008  
10     Evaluate the need to modify the drain     Ryan Welch/ Matt               In process holes in the remaining cisterns           Denny ARS 1 has been plugged 11     Evaluate the need to modify the           Ryan Welch/ Matt               In process Combined Outfall sampler hose             Denny penetration and drain hole 12     Identify potential pathways for           Heather Baxter/ Don         Complete 4/1/09 groundwater migration from cistern to     Edwards off-site locations through groundwater 13     If blowdown line is found leaking,         Heather Baxter/ Don         Complete 4/1/09 estimate the leak rate to determine if a   Edwards leak of licensed material exceeds the NEI 07-07 volumetric criteria for licensed material.
< 1.91E-06 12/15/2008  
14     Evaluate the location of new site         Heather Baxter/Don           Complete 4/1/09 monitoring wells                           Edwards Section 6 - References
< 1.72E-06 MH-72A-SA 3/5/2008 < 1.82E-06 11/6/2008
* NEI 07-07 (Final) - Industry Ground Water Protection Initiative
< 2.03E-06 MH-71D-SB 1/26/2008  
  "   EPRI - Groundwater Protection Guidelines for Nuclear Power Plants TR 1015118, November 2007
< 1.87E-06 7/1/2008 < 1.96E-06 9/22/2008  
 
< 1.91E-06 12/15/2008  
Page   :   12 Printed: 04/29/09 00309035 ACTION REQUEST ASSIGNMENT NUMBER 06     SUB Type         : ENHN         Due Date           06/01/09 Status       : AWAIT/C     Reschedule                       Pri Resp Group: ERCCSUPT Assigned To :   H BAXTER                                       Sec Resp Group:
< 1.72E-06 MH-71B-SB 3/5/2008 < 1.82E-06 8/12/2008  
Subject       : ENHN-DOCUMENT IN THE 2008 ARERR REPORT THE GROUNDWATER CI Aff Facility: HNP           Unit                             System UCR                         Schedule Ref Organization:               Department       : 175           Discipline Est Manhrs   :             Est Comp Date Assignment Status History Updated Date     Updated By     Assgn Status     Assgn Due Date 01/05/09         GRUBBT         INPROG 01/05/09         GRUBBT                           06/01/09 01/05/09         GRUBBT         NTFY/PRI 01/05/09         CATTCH         ACC/PRI 01/05/09         CATTCH         NTFY/ASG 04/28/09         BAXTEH         ACC/ASG 04/28/09         BAXTEH         AWAIT/C DOCUMENT IN THE.2008 ARERR REPORT THE GROUNDWATER CISTERN RESULTS Assignment Attribute     Value                       Reqd Date BENEFIT REALIZED                                     N Name Assignment Attribute     Value                       Reqd Date 1 CHANGE BASIS                                       N Name Assignment Attribute Value                           Reqd Date 2 COMMENTS                                           N Name :
< 1.90E-06 TRITIUM MANHOLE DATE (uCi/ml)MH-523B 3/5/2008 < 1.82E-06 8/12/2008  
COMPLETION NOTES CAUSE/ACTION ASSIGNMENT COMPLETION APPROVAL Route List: 001                                 Route List Initiator: BAXTEH Alert                             Send   Send Action           Action PASSPORT Fac Group/Type       Last Name             Date   Time Taken           Date/Time ROBINJO2 HNP ERCCSUPT     A ROBINSON           04/28/09 01:39 APPROVED 04/28/09 07:27 HNP CHUEVAL     A ROBINSON           04/28/09 07:27
< 1.90E-06 11/3/2008  
: Groundwater Samples taken in support of Groundwater Protection Initiative NEI 07-07 Industry Groundwater Protection Initiative -
< 2.03E-06 MH-523A 3/5/2008 < 1.82E-06 8/12/2008  
Final Guidance Document, Objective 2.4 Samples were taken at various locations throughout the plant in support of the Groundwater Protection Initiative.
< 1.90E-06 11/3/2008  
Samples included the cistern enclosure of the Air Relief Valve for the Cooling Tower Blowdown Line, and Vaults and Yard Drains that may have collapsed and contain water that could potentially affect groundwater. All samples analyzed at HNP showed no detectable tritium activity. 3out of 6 samples from Cistern #2 analyzed at the Harris E&E Center showed activity less than the LLD value for the Harris Plant. The Harris E&E center analyzes to a lower LLD. An investigation is in process concerning the 3 positive results.
< 2.03E-06 MH-519 7/15/2008  
TRITIUM                                              TRITIUM MANHOLE         DATE           (uCi/ml)               MANHOLE      DATE          (uCi/ml)
< 1.96E-06 10/7/2008  
Cistern #2                                               MH-523B 1/7/2008   <   1.90E-06                            3/5/2008    <  1.82E-06 4/2/2008   <   1.98E-06                            8/12/2008    <  1.90E-06 6/26/2008   <   2.22E-06                           11/3/2008   <  2.03E-06 9/15/2008       8.78E-07               MH-523A 10/15/2008         7.47E-07                             3/5/2008   < 1.82E-06 12/1/2008       7.35E-07                            8/12/2008   < 1.90E-06 MH-12 B-SA                                                                  11/3/2008   < 2.03E-06 3/5/2008   <   1.82E-06               MH-519 MH-75                                                                7/15/2008   < 1.96E-06 7/15/2008   <   1.96E-06                           10/7/2008   < 1.96E-06 10/7/2008   <   1.96E-06               MH-511B MH-72D-SB                                                                   4/8/2000    <  1.88E-06 1/26/2008   <   1.87E-06                            7/2/2008    <  2.02E-06 7/1/2008   <   1.96E-06                           9/23/2008   < 2.02E-06 8/12/2008   <   1.90E-06               MH-511A 9/22/2008    <  1.91E-06                            3/5/2008   < 1.82E-06 12/15/2008     <   1.72E-06                           11/6/2008    <  2.03E-06.
< 1.96E-06 MH-511B 4/8/2000 < 1.88E-06 7/2/2008 < 2.02E-06 9/23/2008  
MH-72A-SA                                                      MH-51 3/5/2008   <   1.82E-06                           10/7/2008   < 1.96E-06 11/6/2008   <   2.03E-06               MH-505E MH-71D-SB                                                                  1/26/2008   < 1.87E-06 1/26/2008   <   1.87E-06                             4/8/2008   < 1.88E-06 7/1/2008   <   1.96E-06                           9/15/2008   < 2.03E-06 9/22/2008    <   1.91E-06                           10/13/2008   < 1.95E-06 12/15/2008    <  1.72E-06                          12/15/2008   < 1.72E-06 MH-71B-SB                                                        MH-505B 3/5/2008   <   1.82E-06                           1/26/2008   < 1.87E-06 8/12/2008   <   1.90E-06                             3/5/2008   < 1.82E-06
< 2.02E-06 MH-511A 3/5/2008 < 1.82E-06 11/6/2008  
 
< 2.03E-06.MH-51 10/7/2008  
11/6/2008 < 2.03E-06           4/8/2008 1 < 1.88E-06 MH-70D                                  7/29/2008 <   1.86E+06 1/26/2008 < 1.87E-06           9/2/2008   < 1.90E-06 7/1/2008 < 1.96E-06         9/23/2008   < 2.02E-06 9/22/2008 < 1.91E-06         11/26/2008   < 1.90E&06 12/15/2008 < 1.72E-06 MH-505A MH-69                                    3/5/2008   < 1.82E-06 10/7/2008 < 1.96E-06         11/6/2008   < 2.03E-06 MH-61                         MH-503 2/20/2008 < 1.85E-06         7/29/2008   < 1.86E-06 7/29/2008 < 1.86E-06 MH-43 10/14/2008 < 1.92E-06         7/15/2008   <   1.96E-06 MH-59                          MH-41 10/14/2008 < 1.92E-06         10/7/2008   <   1.96E-06 MHR525E            <          MH-31 7/2/2008 < 2.02E-06         7/29/2008   <   1.86E-06 12/15/2008 < 1.72E-06 MH-29 MH-523D                                7/29/2008   <   1.86E-06 1/26/2008 < 1.87E-06 MH-27 7/1/2008 < 1.96E-06         7/29/2008   <   1.86E-06 10/14/2008 < 1.95E-06 MH-23 MH-17                                  9/15/2008   < .1.91E-06 7/29/2008 < 1.86E-06 MH-19 10/14/2008 < 1.92E-06         10/14/2008   <   1.92E-06}}
< 1.96E-06 MH-505E 1/26/2008  
< 1.87E-06 4/8/2008 < 1.88E-06 9/15/2008  
< 2.03E-06 10/13/2008  
< 1.95E-06 12/15/2008  
< 1.72E-06 MH-505B 1/26/2008  
< 1.87E-06 3/5/2008 < 1.82E-06 11/6/2008< 2.03E-06 4/8/2008 1 < 1.88E-06 MH-70D 1/26/2008  
< 1.87E-06 7/1/2008 < 1.96E-06 9/22/2008  
< 1.91E-06 12/15/2008  
< 1.72E-06 MH-69 10/7/2008  
< 1.96E-06 MH-61 2/20/2008  
< 1.85E-06 7/29/2008  
< 1.86E-06 10/14/2008  
< 1.92E-06 MH-59 10/14/2008  
< 1.92E-06 MHR525E <7/2/2008 < 2.02E-06 12/15/2008  
< 1.72E-06 MH-523D 1/26/2008  
< 1.87E-06 7/1/2008 < 1.96E-06 10/14/2008  
< 1.95E-06 MH-17 7/29/2008  
< 1.86E-06 10/14/2008  
< 1.92E-06 7/29/2008  
< 1.86E+06 9/2/2008 < 1.90E-06 9/23/2008  
< 2.02E-06 11/26/2008  
< 1.90E&06 MH-505A 3/5/2008 < 1.82E-06 11/6/2008
< 2.03E-06 MH-503 7/29/2008  
< 1.86E-06 MH-43 7/15/2008  
< 1.96E-06 MH-41 10/7/2008  
< 1.96E-06 MH-31 7/29/2008
< 1.86E-06 MH-29 7/29/2008
< 1.86E-06 MH-27 7/29/2008
< 1.86E-06 MH-23 9/15/2008
< .1.91E-06 MH-19 10/14/2008
< 1.92E-06}}

Latest revision as of 16:17, 21 March 2020

Nuclear Condition Report for Tritium in Groundwater
ML101940276
Person / Time
Site: Harris Duke Energy icon.png
Issue date: 12/02/2008
From:
- No Known Affiliation
To:
Office of Information Services
References
FOIA/PA-2010-0209
Download: ML101940276 (14)
v • d • e


Text

3 Page Printed: 04/29/09 ACTION REQUEST 00309035 Type  : NCR Orig Date: 12/02/08 07:38 Discovery Date:

Subject  : WATER IN CISTERN BOX AIR RELIEF VLVE#1 COOLING TOWER BLOWDOW Description THE CISTERN BOX SURROUNDING AIR RELIEF VALVE #10F COOLING TOWER BLOWDOWN LINE WAS INSPECTED ON 12/1/08 AT 1300. THE BOX HAD APPROXIMATELY 150 GALLONS OF STANDING WATER. TWO WEEKS PREVIOUS, 11/18/08 THE CONTAINMENT BOX WAS PUMPED OUT AND 150-200 GALLONS OF WATER WAS REMOVED. A SAMPLE WAS PULLED FOR ANALYSIS. THE WATER WAS COUNTED TO HNP LOWER LIMIT OF DETECTION AND WAS FOUND TO HAVE <1850 PCI/L OF TRITIUM. COOLING TOWER BLOWDOWN DISCHARGE IS AROUND 3500 PCI/L, THEREFORE THE WATER DOES NOT HAVE THE CHARACTERISTICS OF PLANT EFFLUENT. THE SAMPLE WAS SENT TO THE HEEC TO BE ANALYZED TO THE ENVIRONMENTAL LOWER LIMIT FROM TRITIUM OF 250 PCI/L.

Priority  : 2 Report To  : Status: APPROVED 12/04/08 Due Date  : 12/03/09 Event Date Originator  : BAXTEH Originator Group:

Facility  : HNP Department I75 1: Organization:

owed To  : Owed To Group  : CHUEVAL Owed To Fac: HNP Department  : Discipline AR Status History Updated Date Updated By AR Status AR Due Date 12/02/08 BAXTEH INPROG 12/02/08 BAXTEH H/APPR 12/04/08 FURRJA 12/03/09 12/04/08 FURRJA PRE-APRV 12/04/08 FURRJA APPROVED A

(>1

ATTACHMENT 3 Sheet 1 of 2 ADVERSE CONDITION INVESTIGATION FORM Form CAP-NGGC-0200-3-18 Action Request Number: 309035 Investigator: Heather Baxter

1. Adverse Condition Description The cistern box surrounding air relief valve #1 of cooling tower blowdown line was inspected on 12/1/08 at 1300. The box had approximately 150 gallons of standing water. Two weeks previous, 11/18/08 the containment box was pumped out and 150-200 gallons of water was removed. A sample was pulled for analysis. The water was counted to HNP lower limit of detection and was found to have <1850 pCi/L of tritium. Cooling Tower Blowdown discharge is around 3500 pCi/L, therefore the water does not have the characteristics of plant effluent. The sample was analyzed by the HEEC and found to contain 735 pCi/L

+/- 155 pCi/L. This is less than the 20,000 pCi/L reporting criteria, therefore the sample is not reportable.

2. Investigation Summary

" What Should Be:

o The Cooling Tower Blowdown Air Relief Valve cistern boxes should be devoid of standing water.

o The groundwater along the Cooling Tower Blowdown line cannot have detectible tritium.

  • What Is:

o The cistern box surrounding the air relief valve #1 has historically filled with groundwater. The water level inside the box rises and falls depending upon weather conditions.

o Several repeat samples of the groundwater in the cistern have shown about 800 pCi/L +/- 155 pCi/L of tritium.

  • How it happened:

o On 12/16/08 the cistern box was pumped out a second time and 225 gallons of water was removed. During the pump out, groundwater flowed into the cistern via a drain pipe hole located on the floor of the cistern.

o A sample of the water from the drain pipe contained 850 pCi/L +/- 155 pCi/L of tritium.

  • The inappropriate act or equipment malfunction.

o The cistern box drain is designed to drain water from the cistern to the surrounding ground to prevent standing water from accumulating around the air relief valve stem. The hydraulic pressure from the surrounding water table causes groundwater to backflow into the cistern.

o An unknown source of tritium is contaminating the groundwater surrounding the air relief valve

  1. 1 cistern box.
  • Why happened.

o The Cooling Tower Blowdown line is a 4 foot fiberglass line that is buried underground. It travels from the discharge weir at the base of the Cooling Tower to the discharge point near Harris Lake Spillway. In order to prevent air binding of the line, a series of air relief valves and manholes are placed along the length of the pipe. During plant construction, the pipe was buried several feet underground. The air relief valves were placed inside of large underground cisterns to provide easy access.

According to plant construction diagrams, the Cooling .Tower Blowdown pipe was placed upon a bed of gravel and backfilled with soil. At the bottom of each cistern was a small drain, which drains to the surrounding gravel. During the pump out on 12/16/08 it was observed that water was flowing into the cistern from the drain hole at a rate of about 0.5 L/min.

o As part of the site's Radiological Environmental Monitoring Program (REMP) the HNP Environmental Groundwater Monitoring Program utilizes on-site deep wells to. monitor the tritium concentration of the groundwater. The typical lower level of detection for tritium in groundwater samples is 250 pCi/L. Historically the site's monitoring wells have all been less than detectible

(<LLD) for tritium. The water inside of the cistern was sampled and analyzed at the environmental lower limit of detection. The table below shows the results:

Tritium (pCi/L)

(+/-155 pCi/L) 9/15/08 747 10/15/08 878 12/1/08 735 12/16/08 850 Even after the cistern is pumped out or rainfall events, the concentration of tritium within the cistern is within the error associated with the measurement. Therefore, the groundwater surrounding the cistern is contaminated with 800 pCi/L of tritium.

The pipe carries plant liquid releases to Harris Lake for discharge. Because of the reuse of Harris Lake, the concentration of tritium in the blowdown effluent is approximately 4000-5000 pCi/L. This concentration varies due to release tanks, concentration of lake tritium, and rainfall.

In addition, the concentration of Harris Lake itself ranges from 3000 - 9000 pCi/L. At this point it is difficult to say where the tritium in the groundwater is coming from. It is possible that the tritium in the lake is impacting the groundwater surrounding the Cooling Tower Blowdown line or the Cooling Tower Blowdown line has a leak which is releasing blowdown effluent into the groundwater. Further investigation will be required to determine the source of the tritium in the groundwater.

An action plan will need to be developed to identify the source of the tritium in the groundwater, as well as, the remediation protocol to prevent migration of licensed material off-site and to minimize decommissioning impacts.

DESCRIPTION CAUSE COD ORG CORRECTIVE ASSIGNMENT ASSIGNEE/ DUE OR E ACTION TYPE CONCURREN COMPLETIO CE N DATE**

ADVERSE 800 pCi/L of Pump out the water CORR Larry Garner Complete CONDITION tritium was N/A NIA N/A in the cistern box discovered in and dispose of the the Cooling water appropriately Tower Air Relief cistern Develop and CORR Heather 4/15/09 implement Action Baxter Plan for tritium source I/A Detectible (Apparent) J7U N/A See corrective NA NA NA concentration of The Cooling Tower action above for tritium found in Blowdown line may adverse condition water be leaking blowdown effluent OTHER Document in the ENHN Heather 6/1/09 N/A N/A N/A NIA 2008 ARERR Baxter report the groundwater cister results J:\Shared\Cause Codes\CAP Cause Codes.doc

Page 10 Printed: 04/29/09 ACTION REQUEST 00309035 ASSIGNMENT NUMBER05 SUB Type  : CORR Due Date  : 07/16/09 Status  : NTFY/ASG Reschedule  : 1 Pri Resp Group: ERCCSUPT Assigned To : H BAXTER Sec Resp Group:

Subject  : CORR-DEVELOP AND IMPLEMENT ACTION PLAN FOR TRITIUM SOURC Aff Facility: HNP Unit  : System UCR Schedule Ref Organization: Department  : 175 Discipline Est Manhrs  : Est Comp Date Assignment Status History Updated Date Updated By Assgn Status Assgn Due Date 12/02/08 BAXTEH INPROG 12/31/08 GRUBBT 04/15/09 12/31/08 GRUBBT NTFY/PRI 12/31/08 CATTCH ACC/PRI 12/31/08 CATTCH NTFY/ASG 04/15/09 FURRJA 07/16/09 DEVELOP AND IMPLEMENT ACTION PLAN FOR TRITIUM SOURCE Assignment Attribute Value Reqd Date BENEFIT REALIZED N Name Assignment Attribute Value Reqd Date 1 UNIT/SECT EVALUATR N Name Assignment Attribute Value Reqd Date 1A COMMITTED N Name :

Assignment Attribute Value Reqd Date lB CHANGE BASIS N Name First extension approved by Supervisor and Licensing/PERAS if NRC committed Additional extensions approved by Unit Manager/Superintendent and Licensing/PERAS if committed Justification should include the following:

Why the assignment is being extended; to allow implementation of action plan The new due date: 7/16/09 Why the new due date is acceptable from a nuclear safety and risk perspective: No radiological concern since we are dealing with Cooling Tower blow down line.

Concurrence received from Chris Burton via Mike Robinson on 4/15/09.

Page  : ii Printed: 04/29/09 ACTION REQUEST 00309035 Assignment Attribute Value Reqd Date 2 MISCELLANEOUS N Name Assignment Attribute Value Reqd Date 2A COMMENTS N Name Assignment Attribute Value Reqd Date 2B COMMENTS N Name Assignment Attribute Value Reqd Date 2C COMMENTS N Name :

Assignment Attribute Value Reqd Date 2D COMMENTS N Name :

Assignment Attribute Value Reqd Date 2E COMMENTS N Name Assignment Attribute Value Reqd Date 3A LTCA APPROVAL N Name Assignment Attribute Value Reqd Date 3B LTCA CONCURRENCE N Name :

COMPLETION NOTES CAUSE/ACTION ASSIGNMENT COMPLETION APPROVAL Route List: 001 Route List Initiator:

Alert Send Send Action Action PASSPORT Fac Group/Type Last Name Date Time Taken Date/Time HNP ERCCSUPT A HNP CHUEVAL A

Develop and implement Action Plan for tritium source HNP Action Plan for GroundwaterProtectionProgram Rev 1 (1/7/09)

Developer: Heather Baxter, Don Edwards Responsible Supervisor: Mike Robinson Date Initiated: 1/5/2009 AR Number: 309035 Section 1 -Define Problem and. Expected Results In accordance with the industry's Groundwater Protection Initiative, Harris Nuclear Plant is required to develop and implement a groundwater protection program to assure timely and effective management of situations involving inadvertent releases of licensed material to the groundwater.

This action plan will address management, remediation and decommissioning impacts of tritium detected along the Cooling Tower Blowdown Line and the addition of new monitoring wells.

Section 2 - Current Facts and Assumptions

  • Facts:

The water that is flooding the cistern that surrounds the Air Relief Valve #1 of the Cooling Tower Blowdown line contains 800 pCi/L of tritium. Both Harris Lake and the Cooling Tower Blowdown typically contains about 6000 pCi/L tritium. As part of the site's Radiological Environmental Monitoring Program the HNP Environmental Groundwater Monitoring Program utilizes on-site deep wells to monitor the tritium concentration of the groundwater. The typical lower level of detection for tritium in the groundwater samples is 250 pCi/L. Historically the site's monitoring wells have shown less than detectible (<250 pCi/L) of tritium. Therefore, the tritium concentration in the groundwater is not naturally occurring.

There are currently no monitoring wells in the vicinity of the Cooling Tower Blowdown line; therefore the hydrogeological conditions of the site have not been evaluated.

Assumptions:

Since the source of the tritium in the groundwater surrounding the Cooling Tower Blowdown line is not naturally occurring, it is assumed that the groundwater tritium is either due to a Cooling Tower Blowdown Line leak or Harris Lake influence.

Section 3 - Define Needed Resources Chemistry -

1. Manage the Groundwater Protection Program to ensure compliance with all rules and regulations
2. Analyze the groundwater samples for tritium and gamma emitters
3. Make recommendations for remediation
4. Document actions associated with this action plan in the site decommissioning 50.75(g) file.
5. Analyze soil samples for gamma emitters
6. If blowdown line is found leaking, estimate the leak rate to determine if a leak of licensed material exceeds the NEI 07-07 volumetric criteria for licensed material.

Engineering -

1. Evaluate Cooling Tower Blowdown Line for leaks
2. Evaluate modifying Combined Outfall Sampler pipe to prevent Cooling Tower Blowdown from interacting with groundwater
3. Evaluate Cooling Tower Blowdown cistern drain holes Maintenance/Facility -
1. Pump out the water from the cistern and obtain a sediment sample
2. Provide access to the Cooling Tower Blowdown Line site Contract - Silar Services
1. Evaluate the hydrogeologic conditions of the site and determine if there is a potential for water from that location to get off site
2. Install piezometers to measure isoconcentrations of tritium, if needed
3. Evaluate the influence of Harris Lake on the site's groundwater

Section 4 - Define the Nuclear or Personnel Safety Impact of the Problem (if applicable)

This problem does not represent a plant nuclear or personnel safety risk. The Groundwater Protection Program was implemented to provide public confidence in the nuclear industry and is enforced by the Nuclear Regulatory Commission. Even though 800 pCi/L of tritium is significantly below the 20,000 pCi/L of tritium reporting limit, any detectible tritium is a concern to the public. In order to help maintain a good relationship with the surrounding community and stakeholders the site must be proactive and efficiently deal with the problem.

Section 5 - Action Plan Actiyity Assignee Expected Date of Completion 1 Revise Silar Services contract to provide Charlie Ross/ Mike Complete services to HNP site Robinson 2 Obtain, from Silar Services, an Heather Baxter/ Don Complete 4/1/09 evaluation of the area's hydrogeologic Edwards conditions and possible impact to the public 3 Sample perched water along the Cooling Heather Baxter/ Don Complete 2/5/09 Tower Blowdown Line for tritium Edwards 4 Measure the tritiumconcentration along Heather Baxter/ Don Complete 3/4/09 the blowdown line to help isolate the Edwards possible location of a leak.

5 Obtain soil samples from the area and Heather Baxter/ Don Complete 2/5/09 cistern sediment and measure for Edwards gamma emitters 6 Evaluate the remediation required for Heather Baxter/ Don In process 4/1/09 the site Edwards 7 Document decommissioning impacts in Heather Baxter/ Don Once actions (#1-6,11) the plant 50.75(g) file Edwards are complete 8 If a leak is discovered, evaluate the Ryan Welch/ Matt In process impact of the leak upon the Cooling Denny Tower Blowdown system 9 Evaluate the cistern drain and methods Ryan Welch/ Matt In progress to prevent backflow Denny

10 Evaluate the need to modify the drain Ryan Welch/ Matt In process holes in the remaining cisterns Denny ARS 1 has been plugged 11 Evaluate the need to modify the Ryan Welch/ Matt In process Combined Outfall sampler hose Denny penetration and drain hole 12 Identify potential pathways for Heather Baxter/ Don Complete 4/1/09 groundwater migration from cistern to Edwards off-site locations through groundwater 13 If blowdown line is found leaking, Heather Baxter/ Don Complete 4/1/09 estimate the leak rate to determine if a Edwards leak of licensed material exceeds the NEI 07-07 volumetric criteria for licensed material.

14 Evaluate the location of new site Heather Baxter/Don Complete 4/1/09 monitoring wells Edwards Section 6 - References

  • NEI 07-07 (Final) - Industry Ground Water Protection Initiative

" EPRI - Groundwater Protection Guidelines for Nuclear Power Plants TR 1015118, November 2007

Page  : 12 Printed: 04/29/09 00309035 ACTION REQUEST ASSIGNMENT NUMBER 06 SUB Type  : ENHN Due Date 06/01/09 Status  : AWAIT/C Reschedule Pri Resp Group: ERCCSUPT Assigned To : H BAXTER Sec Resp Group:

Subject  : ENHN-DOCUMENT IN THE 2008 ARERR REPORT THE GROUNDWATER CI Aff Facility: HNP Unit System UCR Schedule Ref Organization: Department  : 175 Discipline Est Manhrs  : Est Comp Date Assignment Status History Updated Date Updated By Assgn Status Assgn Due Date 01/05/09 GRUBBT INPROG 01/05/09 GRUBBT 06/01/09 01/05/09 GRUBBT NTFY/PRI 01/05/09 CATTCH ACC/PRI 01/05/09 CATTCH NTFY/ASG 04/28/09 BAXTEH ACC/ASG 04/28/09 BAXTEH AWAIT/C DOCUMENT IN THE.2008 ARERR REPORT THE GROUNDWATER CISTERN RESULTS Assignment Attribute Value Reqd Date BENEFIT REALIZED N Name Assignment Attribute Value Reqd Date 1 CHANGE BASIS N Name Assignment Attribute Value Reqd Date 2 COMMENTS N Name :

COMPLETION NOTES CAUSE/ACTION ASSIGNMENT COMPLETION APPROVAL Route List: 001 Route List Initiator: BAXTEH Alert Send Send Action Action PASSPORT Fac Group/Type Last Name Date Time Taken Date/Time ROBINJO2 HNP ERCCSUPT A ROBINSON 04/28/09 01:39 APPROVED 04/28/09 07:27 HNP CHUEVAL A ROBINSON 04/28/09 07:27

Groundwater Samples taken in support of Groundwater Protection Initiative NEI 07-07 Industry Groundwater Protection Initiative -

Final Guidance Document, Objective 2.4 Samples were taken at various locations throughout the plant in support of the Groundwater Protection Initiative.

Samples included the cistern enclosure of the Air Relief Valve for the Cooling Tower Blowdown Line, and Vaults and Yard Drains that may have collapsed and contain water that could potentially affect groundwater. All samples analyzed at HNP showed no detectable tritium activity. 3out of 6 samples from Cistern #2 analyzed at the Harris E&E Center showed activity less than the LLD value for the Harris Plant. The Harris E&E center analyzes to a lower LLD. An investigation is in process concerning the 3 positive results.

TRITIUM TRITIUM MANHOLE DATE (uCi/ml) MANHOLE DATE (uCi/ml)

Cistern #2 MH-523B 1/7/2008 < 1.90E-06 3/5/2008 < 1.82E-06 4/2/2008 < 1.98E-06 8/12/2008 < 1.90E-06 6/26/2008 < 2.22E-06 11/3/2008 < 2.03E-06 9/15/2008 8.78E-07 MH-523A 10/15/2008 7.47E-07 3/5/2008 < 1.82E-06 12/1/2008 7.35E-07 8/12/2008 < 1.90E-06 MH-12 B-SA 11/3/2008 < 2.03E-06 3/5/2008 < 1.82E-06 MH-519 MH-75 7/15/2008 < 1.96E-06 7/15/2008 < 1.96E-06 10/7/2008 < 1.96E-06 10/7/2008 < 1.96E-06 MH-511B MH-72D-SB 4/8/2000 < 1.88E-06 1/26/2008 < 1.87E-06 7/2/2008 < 2.02E-06 7/1/2008 < 1.96E-06 9/23/2008 < 2.02E-06 8/12/2008 < 1.90E-06 MH-511A 9/22/2008 < 1.91E-06 3/5/2008 < 1.82E-06 12/15/2008 < 1.72E-06 11/6/2008 < 2.03E-06.

MH-72A-SA MH-51 3/5/2008 < 1.82E-06 10/7/2008 < 1.96E-06 11/6/2008 < 2.03E-06 MH-505E MH-71D-SB 1/26/2008 < 1.87E-06 1/26/2008 < 1.87E-06 4/8/2008 < 1.88E-06 7/1/2008 < 1.96E-06 9/15/2008 < 2.03E-06 9/22/2008 < 1.91E-06 10/13/2008 < 1.95E-06 12/15/2008 < 1.72E-06 12/15/2008 < 1.72E-06 MH-71B-SB MH-505B 3/5/2008 < 1.82E-06 1/26/2008 < 1.87E-06 8/12/2008 < 1.90E-06 3/5/2008 < 1.82E-06

11/6/2008 < 2.03E-06 4/8/2008 1 < 1.88E-06 MH-70D 7/29/2008 < 1.86E+06 1/26/2008 < 1.87E-06 9/2/2008 < 1.90E-06 7/1/2008 < 1.96E-06 9/23/2008 < 2.02E-06 9/22/2008 < 1.91E-06 11/26/2008 < 1.90E&06 12/15/2008 < 1.72E-06 MH-505A MH-69 3/5/2008 < 1.82E-06 10/7/2008 < 1.96E-06 11/6/2008 < 2.03E-06 MH-61 MH-503 2/20/2008 < 1.85E-06 7/29/2008 < 1.86E-06 7/29/2008 < 1.86E-06 MH-43 10/14/2008 < 1.92E-06 7/15/2008 < 1.96E-06 MH-59 MH-41 10/14/2008 < 1.92E-06 10/7/2008 < 1.96E-06 MHR525E < MH-31 7/2/2008 < 2.02E-06 7/29/2008 < 1.86E-06 12/15/2008 < 1.72E-06 MH-29 MH-523D 7/29/2008 < 1.86E-06 1/26/2008 < 1.87E-06 MH-27 7/1/2008 < 1.96E-06 7/29/2008 < 1.86E-06 10/14/2008 < 1.95E-06 MH-23 MH-17 9/15/2008 < .1.91E-06 7/29/2008 < 1.86E-06 MH-19 10/14/2008 < 1.92E-06 10/14/2008 < 1.92E-06

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