ML17121A377

Annual Environmental Operating Report 2016

ML17121A377
Person / Time
Site:	Wolf Creek
Issue date:	04/24/2017
From:	Hafenstine C Wolf Creek
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RA 17-0033
Download: ML17121A377 (13)

Text

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• r NUCLEAR OPERATING CORPORATION April 24, 2017 Cynthia R. Hafenstine Manager Nuclear and Regulatory Affairs RA 17-0033 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

Subject:

Docket No. 50-482: Annual Environmental Operating Report 2016 To Whom It May Concern:

The purpose of this letter is to submit the enclosed Annual Environmental Operating Report.

The Annual Environmental Operating Report is being submitted pursuant to Wolf Creek Generating Station (WCGS) Renewed Facility Operating License NPF-42, Appendix B, "Environmental Protection Plan." This report covers the operation of WCGS for the period of January 1, 2016, through December 31, 2016.

This letter contains no commitments. If you have any questions concerning this matter, please contact me at (620) 364-4204.

Sincerely, Cynthia R. Hafenstine CRH/rlt

Enclosure:

Wolf Creek Generating Station Annual Environmental Operating Report 2016 cc: K. M. Kennedy (NRG), w/e B. K. Singal (NRG), w/e N. H. Taylor (NRG), w/e Senior Resident Inspector (NRG), w/e

/~*25 lVAA P.O. Box 411 I Burlington, KS 66839 I Phone: (620) 364-8831 An Equal Opportunity Employer M/F/HCNET

Enclosure to RA 17-0033 Wolf Creek Generating Station Annual Environmental Operating Report (11 pages)

WOLF CREEK GENERATING STATION ANNUAL ENVIRONMENTAL OPERATING REPORT 2016 ENVIRONMENTAL MANAGEMENT ORGANIZATION WOLF CREEK NUCLEAR OPERATING CORPORATION P.O. BOX411 BURLINGTON, KANSAS 66839

TABLE OF CONTENTS

1.0 INTRODUCTION

................................................................................................. 3 2.0 ENVIRONMENTAL MONITORING ...................................................................... 3 2.1 AQUATIC [Environmental Protection Plan (EPP) Section 2.1] ............ 3 2.1.1 Impacts of Water Withdrawal on the Neosho River .................... 3 2.1.2 Oxidizing Biocide Discharges to Coffey County Lake ................. 4 2.1.3 Cold Shock ................................................................................ 5 2.1.4 Impingement and Entrainment ................................................... 5 2.1.5 Impacts of Coffey County Lake Discharges ................................ 5 2.2 TERRESTRIAL [EPP Section 2.2] .......................................................... 6 2.2.1 Control of Vegetation in the Exclusion Zone ...... ,........................ 6 2.2.2 Vegetation Buffer Zone Surrounding Coffey County Lake .......... 9 2.2.3 Herbicide Use for Maintenance of WCGS Structures ................. 6 2.2.4 Waterfowl Disease Contingency Plan and Monitoring ................ 6 2.2.5 Fog Monitoring Program [EPP Subsection 4.2.1] ....................... 7 2.2.6 Wildlife Monitoring Program [EPP Subsection 4.2.2] .................. 7 2.2. 7 Land Management Program [EPP Subsection 4.2.3] ................. 8 3.0 ENVIRONMENTAL PROTECTION PLAN REPORTING REQUIREMENTS ........ 8 3.1 PLANT DESIGN OR OPERATION CHANGES [EPP Section 3.1] .......... 8 3.2 NON-ROUTINE ENVIRONMENTAL REPORTS ..................................... 11 3.2.1 Submitted Non-routine Reports ................................................. 11 3.2.2 Unusual or Important Environmental Event Evaluations ............ 11 2

1.0 INTRODUCTION

The 2016 Annual Environmental Operating Report is being submitted in accordance with the objectives of the Environmental Protection Plan (EPP), Appendix B to the Facility Operating License NPF-42. The purpose of this report is to demonstrate that the Wolf Creek Generating Station (WCGS) operated during 2016 in a manner protective of the environment.

2.0 ENVIRONMENTAL MONITORING 2.1 AQUATIC [EPP Section 2.1]

2.1.1 Impacts of Water Withdrawal on the Neosho River There were no adverse impacts to the Neosho River due to water-use conflicts because river flows downstream of the makeup pumps were maintained during 2016. Additionally, minimum desirable streamflow at Iola, Kansas, set by K.S.A.

82a-703a, b and c, was exceeded throughout 2016. The WCGS Final Environmental Statement/Operating License Stage (FES/OLS, Section 5.6),

NUREG-0878, postulated that makeup water withdrawal of 41 cubic feet per second (cfs) during drought conditions would extend the duration and severity of low-flow conditions below John Redmond Reservoir (JRR). This, in turn, was expected to reduce riffle habitat that would adversely affect the Neosho Madtom, a federally listed threatened species.

Actual makeup water withdrawals during 2016 are summarized as follows:

Average 111 River Flow (cfs) 2016 Duration Pump Source Period (days) Rate (cfs) Avg Min Max John Redmond Storage 312-417 37 83 145 64 246 121 Neosho River 4/8-4/19 45 77 996 284 2,910 7/13-8/14 (1) Flow measured at United States Geological Survey Gauging Station in Burlington, Kansas.

(2) Before natural flows from the Neosho River are permitted by the Kansas Department of Agriculture, Division of Water Resources to be pumped, a 250 cfs minimum must be maintained downstream of the pumps. Otherwise makeup water is considered to be from JRR storage.

As shown above, average pump rates were less than average river flows measured at the United States Geological Survey Gauging Station in Burlington, Kansas, downstream of the pumps at the Makeup Water Screenhouse (MUSH).

This demonstrates that downstream flows were maintained. In addition, makeup pumps were operated under permitted water 60 of the 82 days.

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For comparison purposes, the 41 cfs assessed in the FES/OLS refers to a continuous annual average from JRR storage. The actual 2016 pumping from JRR storage averaged 83 cfs for 37 days, which was equivalent to 8 cfs, when calculated on a similar, annual basis. This flow rate was lower than the 41 cfs evaluated as impacting the Neosho River during drought conditions.

Auxiliary makeup pumps were operated at flows ranging from 1-2 cfs for an additional 105 days in 2016. However, this was during a time when the Neosho River system was experiencing above-normal hydrologic conditions.

Consequently, makeup pumping activities did not impact flows intended to maintain minimum desirable stream flows in the Neosho River, and no adverse impacts due to water-use conflicts occurred during 2016.

2.1.2 Oxidizing Biocide Discharges to Coffey County Lake (CCL)

Circulating Water System (CWS) Discharge:

There were no adverse impacts observed due to biocides during 2016. Biocide use at WCGS was predicted to cause periodic, appreciable mortality in a conservatively estimated 40 acres of the discharge area to CCL. However, these impacts were not expected to meaningfully affect the overall biological productivity of the lake (FES/OLS, Section 5.5.2.2). The postulated biocide levels expected to cause the impacts were from 0.68 to 1.08 mg/I of total residual chlorine at the CWS discharge (FES/OLS, Section 4.2.6.1).

Actual maximum biocide concentration measured was 0.15 mg/I, and averaged 0.09 mg/I total residual oxidant (TRO) during 2016. This level was much lower than those evaluated in the FES/OLS, thus impacts were considered to be correspondingly less. The Kansas Department of Health and Environment (KDHE) also requires, through the WCGS National Pollutant Discharge Elimination System (NPDES) permit, that biocide discharges for the CWS be less than 0.2 mg/I TRO, for a maximum of two hours per day. Consequently, biocide impacts to CCL have been less than initially evaluated in the FES/OLS, and NPDES compliance assures that this will continue.

Essential Service Water System (ESWS) Discharge:

Flow from the WCGS Service Water System (SWS) diverted *through the Essential Service Water System (ESWS) was completed to provide microbiologically induced corrosion protection and sedimentation control. The KDHE established a 1.0 mg/I TRO limit for the* SWS diversion through the ESWS. Actual maximum TRO was 0.43 mg/I, and averaged 0.22 mg/I during 2016. Based on this information, permitted biocide discharges did not have appreciable effects on the cooling lake environment.

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2.1.3 Cold Shock In the event of a rapid decline in plant power level during winter, fish attracted to the WCGS heated discharge could experience mortality due to a quick reduction in body temperature (cold shock). In reference to licensing document evaluations, the WCGS EPP Section 2.1 (c) states, "Cold shock effects on fish due to reactor shutdowns could cause significant mortality to aquatic species in the cooling lake."

Fish mortality due to cold shock was not observed in CCL following declines in plant power level. One such plant shutdown or power level decrease occurred as follows:

Date Duration (days) 9/2/16 to 11/21/16 80 Fish mortality was not ob~erved following the plant power changes.

Consequently, significant impact to the fishery in CCL due to cold shock events did not occur during 2016.

2.1.4 Impingement and Entrainment Impacts of entrainment and impingement of fish and aquatic organisms due to WCGS cooling water pumping were projected to be significant, as indicated in the WCGS EPP, Section 2.1 (d). EPP Section 2.1 states that the NRC relies on the State of Kansas for determination of the need for monitoring entrainment and impingement impacts. The KDHE requested WCGS to monitor impingement impacts for the Clean Water Act (CWA) 316 (b), Phase II regulations. This monitoring has been completed, and results were submitted to the KDHE in 2008. Entrainment monitoring has not been required. No significant adverse impacts to the CCL fishery were identified because of impingement. Fishery management at WCGS has succeeded in controlling impingement, and minimized potential impacts of impingement to the fishery.

2.1.5 Impacts of Coffey County Lake Discharges to the Neosho River The WCGS NPDES permit requires that CCL discharges be sampled on the first day of each discharge and weekly thereafter until the end of each respective discharge. A discharge limit was set for pH (NPDES Outfall 004). Lake discharges can occur at the Slowdown Spillway and Service Spillway. During 2016, no discharges occurred at the Slowdown Spillway. There were no NPDES violations from discharges from the Service Spillway, and no detrimental effects were expected to the Neosho River water quality.

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2.2 TERRESTRIAL [EPP Section 2.2]

2.2.1 Control of Vegetation in the Exclusion Zone The composition and structure of vegetation in the 453 hectare (1120 acre) exclusion zone were selectively controlled to be compatible with the function and security of station facilities. Most areas in the immediate vicinity of the power block typically have been planted and maintained in a lawn-type condition. Other areas within the exclusion area have been mowed for security and aesthetic purposes. Tree and brush control occurred in some areas.

Various maintenance and construction activities during 2016 have caused temporary impacts to the vegetation in many areas surrounding WCGS. As projects are completed, restoration of the areas involved is expected to return the vegetation in the exclusion zone similar to previous conditions.

2.2.2 Vegetation Buffer Zone Surrounding Coffey County Lake To create a buffer zone of at least 500 acres around CCL, as specified in EPP Section 2.2 (b), agricultural production activities were curtailed in 1980 within a border ranging from approximately 200-400 feet adjacent to the lake shoreline.

This area is approximately 1440 acres. Previously grazed or hayed native grass areas were left undisturbed. Previously cultivated lands were allowed to advance through natural succession stages, or native grasses were established in these areas. Land management activities included controlled burning to enhance and/or maintain the designated buffer zone with a naturally occurring biotic community.

2.2.3 Herbicide Use for Maintenance of WCGS Structures Herbicides were used on transmission corridors, gravel areas, railroad easements, and various land areas associated with WCGS. Only herbicides approved by Environmental Protection Agency and the state of Kansas were used. Application rates followed label instructions. No adverse environmental impacts from herbicide treatment of WCGS facilities were identified.

The transmission lines associated with WCGS include the Wolf Creek-Rose Hill and a small portion of the Wolf Creek-Benton and Wolf Creek/Waverly/La Cygne lines. Herbicides for bare ground control were used on various gravel areas,*

including the switchyard, protected area boundary, meteorological tower, storage tank berms, railroad beds, and storage yards. Noxious weed and nuisance tree/brush growth were controlled on the dam, ahd selected grassland areas around the cooling lake.

2.2.4 Waterfowl Disease Contingency Plan and Monitoring A waterfowl disease contingency plan was maintained to provide guidance for station biologists in the event of suspected or actual disease outbreaks. The contin~ency plan lists appropriate federal and state wildlife agency contacts to be 6

made by Wolf Creek Nuclear Operating Corporation (WCNOC) in the event of such problems. During routine environmental monitoring and surveillance activities taking place over this reporting period, no waterfowl mortality attributable to disease pathogens was identified.

2.2.5 Fog Monitoring Program [EPP Subsection 4.2.1]

Fog monitoring concluded that operation of WCGS did not appreciably increase fogging incidents from that measured before operation. Visibility monitoring was initiated in December, 1983, and continued through 1987. The purpose of this study was to evaluate the impact of waste heat. dissipation from CCL on fog occurrence along U.S. 75 near New Strawn, Kansas. The program was required through one year of commercial operation that started in September 1985. Upon conclusion of 1987 data collection, sufficient information was available to evaluate cooling lake fogging, and all commitments relevant to fog monitoring have been satisfied.

During 2016, there were no reports of fogging incidents in the vicinity of nearby U.S. 75 from individuals or local agencies responsible for traffic safety. Periodic fogging likely caused by the cooling lake did occur during the winter months of 2016, but was restricted to the plant site and immediate vicinity of the lake. No mitigation actions or further monitoring were warranted.

2.2.6 Wildlife Monitoring Program [EPP Subsection 4.2.2]

A wildlife monitoring program was initiated in 1982 to monitor and assess waterfowl, waterbird, and bald eagle usage of CCL. This program included transmission line collision .surveys to assess collision mortality and determine potential mitigation needs. This wildlife monitoring program was to continue for at least two years following WCGS start-up (FES-OLS Section 5.5.1.2), which occurred in September 1985.

Transmission line surveys were conducted from 1983 through 1988. Monitoring of lake use by waterfowl, waterbirds, and bald eagles continued through 1996.

By then, sufficient data had been collected to determine waterfowl, waterbird, and bald eagle usage of CCL. Consequently, the scope of the wildlife monitoring program was reduced. The current program consists of reviewing CCL waterfowl and bald eagle survey data collected by the Kansas Department of Wildlife, Parks and Tourism (KDWPT). If review of the KDWPT's data indicates that usage has increased from that previously documented, then additional monitoring may be initiated if warranted.

Review of waterfowl and bald eagle monitoring data for 2016 collected by the KDWPT indicate that waterfowl and waterbird usage was consistent with past years. Increased transmission line collision potential was not indicated. No disease outbreaks or widespread crop depredation attributable to waterfowl use of CCL were observed. No changes to the wildlife monitoring program were warranted.

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2.2. 7 Land Management Program [EPP Subsection 4.2.3]

Land management activities on all company-owned lands except within the 453 hectare (1120 acre) WCGS exclusion area were designed to achieve balances between agricultural production and conservation values. An annual management plan addressed needs and accepted techniques for land maintenance, soil conservation, and wildlife management. These included the repair or construction of soil conservation structures, wetland areas, and permanent vegetative covers .. In 2014 all cropland was converted to no-till agriculture and cover crops were incorporated into the crop rotation. An environmental education area was improved and maintained as part of the land.

management program. The land management program continued to balance agriculture production and conservation values.

3.0 ENVIRONMENTAL PROTECTION PLAN REPORTING REQUIREMENTS 3.1 PLANT DESIGN OR OPERATION CHANGES [EPP Section 3.1]

Plant design or operational changes were evaluated for potential significant effects to the environment, the presence of which would constitute an unreviewed environmental question (UEQ) per the EPP. Evaluations completed during 2016 demonstrate that significant impacts to the environment would not occur, and that no changes constituted a UEQ. Below are brief descriptions of these evaluations completed in 2016.

1. Installation of 250 MCM Triplex Power Cable The scope of this change package will include installation of underground and exposed conduits to allow installation of a new 250 MCM triplex power cable.

This cable will supply power from the station blackout (SBO) diesels via Switchgear Feeder Breaker, PB00506, to the non-safety auxiliary feedwater pump (NSAFP) motor (DPAP01).

a. Air Emission .Control Program considerations

b. Spill Prevention, Control, and Countermeasure (SPCC) Plan considerations

2. Installation of Targeting System at Security Firing Range The scope of this change package will include relocating the existing targeting system and installing a new targeting system at the Security Firing Range. This work will include the installation of a new tower, constructing a new berm or enlarging one of the existing berms (utilizing spoils left over from the ESW project and currently stored just east of the existing tower), relocating the existing target system, installing a new target system and trenching to install conduit and airline.

a. Hazardous Waste Program considerations

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b. Stormwater Management Program considerations

3. Charles Evans Whittaker Security Building Heating, Ventilation, Air Conditioning Upgrade The project being implemented under SP-06-16 involves a commercial change package which will upgrade the Charles Evans Whittaker Security Building HVAC system. This commercial change package will perform the following: Add five ductless,* mini-split air conditioning units to the basement of the Charles Evans Whittaker Security Building. All units will contain more than 50 pounds of R-410A refrigerant. These air conditioning systems are being added to account for the heat load added by new equipment associated with the Cyber Security Project.

The new air conditioning units will be powered from panel LP-25 (CQ116) installed by Change Package (GP) 015102.

a. Refrigerant Management Program considerations

4. Startup Transformer Modifications The physical scope of the modification is to install two (2) PSStech Open Phase Detection System (OPDS) cabinets MR101A and MR101B for the startup transformer. The cabinets will be installed on a reinforced concrete foundation pad adjacent to the startup transformer. Location and placement of the reinforced concrete for foundation of PSStech OPDS cabinets shall be per drawings WIP-M-1 G00?-000-B-1 and(WIP-C-OC0223-005-A-1. This evaluation assumes the depth of the excavation for the concrete foundations will encounter groundwater.

a. Ground Water Protection Program considerations

5. Startup Transformer Modification The scope of the planned Westar work includes adding a new circuit breaker 345-100 to the north bus of the 345kV Substation, between the west bus and circuit breaker 345-110. This will allow the tie-in point for the No. 1 Startup Transformer to be relocated from its current termination on the West bus to a breaker-and-a-half position between breakers 345-100 and 345-110. This change will also require a section of the 345 kV line for the Startup Transformer

• to be rerouted farther north within the 345 kV Substation so that it turns south to connect to its breaker-and-a-half position. To accomplish these changes, the fence on the western edge of the switchyard will be moved 60 feet to the west.

This, in turn, will require that the roadway at the switchyard's western edge be closed and that a security gate be removed. Also a wooden H-structure toward the south-west corner of the switchyard that supports the 345kV line (between the Startup Transformer and the 90 foot steel tower directly west of the switchyard) will be replaced with a steel H-structure.

a. Solid Waste considerations.

b. Stormwater Management Program considerations 9

6. Ground Water Intrusion Elimination The scope of this change package includes several modifications:

• A new drainage ditch will be developed through modification of current site grading and drainage features originating in the northern portion of Sub Basin 2 (between the Water Treatment Building and Protected Area Boundary (PAB)), extending west and north towards the Hydrogen Storage area, before turning west (south of the Waste Water Treatment basins) and terminating at the north end of Sub Basin 1 (at the north end of Track 1). Flow from the new drainage ditch will enter into the cooling lake through Conduit C-1 just north of the Circulation Water Discharge Structure. Development of the new ditch will require the relocation of several buried utilities known to interfere with the planned routing of the new ditch. Additionally, it will be necessary to relocate any undocumented utilities that may be encountered during the implementation of this modification.

• Localized grading will be modified around Electrical Man Hole 123, 139, and 158 to direct water towards Man Hole 40, 41, 42, 169, and 227.

• Localized grading will be modified around Electrical Man Hole 300 to direct water away from this manhole.

• Modify the top of observation well AB to prevent surface water runoff from entering the well.

• West Fukushima Diverse and Flexible Strategies (FLEX) building's East side hard stand to be extended over Man Hole 276, which will be covered and backfilled over. A new drainage inlet will be placed south of the FLEX building and local grading will be modified to route drainage paths to the new inlet.

a. Stormwater Management Program considerations

b. Groundwater Protection Program considerations

c. Kansas Department of Agriculture, Division of Water Resources groundwater approbation requirements.

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3.2 NON-ROUTINE ENVIRONMENTAL REPORTS [EPP Section 5.4.2]

3.2.1 Submitted Non-routine Reports There were no environmental reports involving significant non-routine impacts submitted to the NRG during 2016.

3.2.2 Unusual or Important Environmental Event Evaluations )

[EPP Section 4.1]

No unusual or important environmental events that indicated or resulted in a significant environmental impact related to plant operations occurred during 2016. .

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