ML20134E666

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Forwards Response to Requested Info Section of GL 96-04, Boraflex Degradation in Spent Fuel Pool Storage Racks, for Plant,Units 2 & 3
ML20134E666
Person / Time
Site: Peach Bottom, Limerick  Constellation icon.png
Issue date: 10/25/1996
From: Hunger G
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-94-04, GL-94-4, NUDOCS 9611010314
Download: ML20134E666 (27)
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stition Cupport Department r.

GL 9443

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v PECO NUCLEAR nco emo c-i 965 Chesterbrook Boulevard A Unit of PECO Energy wayne. PA 19087-5691 October 25,1996 i

Docket Nos. 50-277 4

50-278 50452 50-353 License Nos. DPR-44 DPR-56 4

NPF-39 NPF-85 l

U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Peach Bottom Atomic Power Station Units 2 and 3 Limerick Generating Station, Units 1 and 2 Response to Generic Letter 96-04, "Boraflex Degradation i

in Spent Fuel Pool Stora0e Racks"

Dear Sir:

Attached is our response to the " Requested information" section of the subject Generic Letter (GL) 9644, dated June 26,1996 for Peach Bottom Atomic Power Station (PBAPS), Units 2 and

3. This GL concems the use of Boraflex in the spent fuel storage racks. As discussed in the GL, only those licensees that use Boraflex are required to respond Limerick Generating Station i

(LGS), Units 1 and 2 exclusively uses BORAL as the neutron poison material in its spent fusi l

racks. Therefore, LGS, Units 1 and 2 are not required to respond i

!f you have any questions, please contact us.

Veg truly rs,

4. d.

G. A. Hunger, Jr.

Director - Licensing Attachment, Affidavit H. J. Martin, Administrator, Region I, USNRC (w/ attachment) oc:

W. L Schmidt, USNRC Senior Resident inspector, PBAPS (w/ attachment)

N. S. Perry, USNRC Senior Resident inspector, LGS (w/ attachment) 9611010314 961025 PDR ADOCK 05000277 P

PDR

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l COMMONWEALTH OF PENNSYLVANIA as, i

COUNTY OF CHESTER i

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D. B. Fetters, being first duly sworn, deposes and says:

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l That he is Vice President of PECO Energy Company; that he has read the enclosed response to Generic Latter 9644 dated June 26,1996, for Peach Bottom Facility Operating 1

1 Licenses DPR-44 and DPR-56, and knows the contents thereof; and that the statements and matters set forth therein are true and correct to the best of his knowledge, information and l

belief.

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Vice President Subscribed and swom to before me thish day of

1996,

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Notary 9ublic

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IJary Lou Secoc. NcL7y PuNic i

Tredyffrin Twp., ChesW Cte.*y l

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ATTACHMENT 1 Response to Generic Letter 9604 Peach Bottom Atomic Power Station, Unita 2 and 3 1

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Backsmund In 1986, the spent fuel storage racks at Peach Bottom Atomic Power Station (PBAPS) Units 2 and 3 were replaced with Westinghouse-designed, high-density storage racks which i

contained BORAFLEX as the neutron poison material. This modification was approved by j

the NRC in Amendment Numbers 116 and 120, dated February 19,1986. Because of this j

modification to the spent fuel storage pools, each pool has a storage capacity of 3819 Boiling j

Water Reactor (BWR) fuel assemblies. See Figures 1 and 2 for the spent fuel storage rack 1

arrangement for PBAPS Units 2 and 3 respectively.

The BORAFLEX was manufactured by Brand Industrial Services and is required to have 2

a minimum B" areal density of 0.021 gm/cm as dic==ad in Section 10.3 of the PBAPS i

Updated Final Safety Analysis Report (UFSAR). Each BORAFLEX panel is a continuous sheet centered on the length of the as-stored active fuel. De number of BORAFLEX panels associated with each storage cell depends on the location of the storage cell in the rack.

Most cells (located within the interior of the spent fuel storage rack) have BORAFLEX on all four sides. Cells on the periphery have BORAFLEX panels on three i

sides. Cells on the corner of the spent fuel storage rack have BORAFLEX panels on two sides. (The objective is to maintain a BORAFLEX poison panel between each fuel assembly stored in the racks.) The BORAFLEX panels are each enclosed by a stainless steel wrapper plate. The wrapper plates are attached to the outside of the storage cell enclosure by intermediate spot welds along the entire length of the wrapper. This forms a j

capsule for the BORAFLEX panel. His capsule does not form a watertight seal isolating i

the BORAFLEX panel from the spent fuel pool coolant. See Figures 3 and 4 for the j

configuration of BORAFLEX panel and wrapper plate.

j PECO Energy is an active participant with the Electric Power Research Institute (EPRI) efforts concerning BORAFLEX. PECO Energy participation has taken the form of:

1.

Contributing pool silica data to the EPRI database; 2.

Funding for EPRI research and development including the understanding of the BORAFLEX degradation phenomenon and mitigation measures; 3.

Hosting the. Boron ArealDensityDage forEvaluatingEacks (BADGER) test device hot demonstration; 4.

Utilization of the RACKLIFE BORAFLEX performance computer model.

Assessment of PBAPS BORAFLEX Physical Condition The BORAFLEX panels at PBAPS have been in service since 1986. A review of the silica data shows no adverse trends that may be indicative of significant BORAFLEX degradation.

The wrapper plate as designed, limits the free flowing access of the spent fuel pool coolant 1

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water to the enclosed BORAFLEX panels. This is substantiated by a BADGER test i

performed by EPRI in the PBAPS Unit 2 spent fuel pool during the week of April 8,1996.

A total of 13 in-service BORAFLEX panels were measured by the BADGER. The 13 panels represent a range of gamma exposures from essentially zero to approximately 4.3x10' rads. He test population was selected by a review of the results of a RACKLIFE computer model that was developed for PBAPS Unit 2 by PECO Energy and EPRI. A further limit to the selection process was that spent fuel was not to be moved in order to reduce the likelihood of fuel handling accidents.

f Evaluation of B" Areal Test Results j

The following are the results of the BADGER measurements of the 13 BORAFLEX panels:

j 1.

Panel scans that represent the maiority of spent fuel storage rack cells l

Ten spent fuel pool storage rack BORAFLEX panels were measured by the 20 BADGER. All ten of these panels exceeded the minimum B areal density described in the UFSAR. The impact of the scans show that all panels that have not been reworked or damaged are in compliance with the applicable Technical Specifications. See Table 1 for summary of test results.

2.

Panel scans that represent reworked spent fuel storane rack cells Two spent fuel pool storage rack BORAFLEX panels in storage cell MM-30, that was re-worked during the assembly of the spent fuel racks, were measured by the BADGER. These panels were shown to have slightly less than the requisite minimum B" areal density as described in the UFSAR 2

2 (0.020 and 0.0207 g/cm versus 0.021 g/cm respectively). See Table 2 for a summary of the test results. As a result of this discovery, a records search was performed for the PBAPS Unit 2 spent fuel pool to identify additional reworked cells. This search identified cells MM-30, A-40, DD-46, EE-51, NN-07, and BBB-25. These reworked cells are currently empty, or contain fuel with low reactivity. the cells have been evaluated to ensure that the reactivity remains below.95 K-effective. Additionally, an analysis was performed to justify the continued operation of the PBAPS Unit 2 spent fuel pool. This analysis is discussed in the analysis section of this response. This analysis has determined that considerable margin exists to.95 K-effective. Due to the similarity in design, fuel bundle exposure, rack age, operating history, and pool environment, to PBAPS Unit 2, it was evaluated that no safety concern exists for the PBAPS Unit 3 : pent fuel pool.

3.

Panel scan that represents a notentially damaged wraoper plate One spent fuel pool storage rack BORAFLEX panel (JJ-30 East) is suspected to have a damaged BORAFLEX panel wrapper plate.

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This is indicated by several factors:

i 1.

The BADGER probe was unable to complete a full length scan. It was stopped from reaching the bottom of the storage cell. Data acquisition was thus incomplete regarding the whole panel.

20 2.

The B areal density of the accessible portion of the suspected panel i

2 i

was measured to be 0.0189 g/cm by the BADGER which could be indicative of accelerated BORAFLEX dissolution.

3.

An adjacent BORAFLEX panel of similar gamma dose (JJ-30 South) 20 2

had a measured B areal density of 0.0244 g/cm. This indicates that this wrapper plate was intact and the suspected BORAFLEX dissolution was limited to one panel.

4.

For JJ-30 South, the BADGER could come closer to performing a complete stroke of panel measurement but was stopped approximately 8 inches from the bottom of a complete scan; indicating some obstruction or binding.

See Table 3 for a summary of the test results.

i In the interim, the cell associated with location JJ-30 has been declared j

unusable and no fuel is currently in this cell.

i Results of Post-Onerettamal Tests j

As noted earlier, PECO Energy pioneered the use of the BADGER to obtain the most l

information regarding the condition of in-service BORAFLEX panels during a spent fuel pool assessment campaign. With the exception of the limited gaping measured by the 20 BADGER, the measured B areal density exceeds that required by the PBAPS UFSAR for non-reworked and undamaged storage cell locations. The measured BORAFLEX gaping is randomly distributed thus reducing considerably the reactivity effect. Also, BORAFLEX gaping is due to radiation-induced crosslinking of the polymer which causes the BORAFLEX panel to shrink and thus form gaps. This gap formation thus represents no j

loss of boron from the system. The gap phenomenon merely results in a redistribution of the neutron absorber material to a slightly less than optimum configuration. Thus, the reactivity effect due to BORAFLEX gaps may be considered negligible.

Analysis Performed as a msult of the B ' Areal Density Test Results 2

An analysis was performed to support continued spent fuel storage. The analysis used a bounding representative fuel assembly currently stored in the spent fuel pool storage racks.

i The results of the analysis indicate that the spent fuel currently residing in the storage racks i

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N-have considerable margin to 0.95 K-effective. Fuel having an in-core cold K-infinity of up to 1.155 can be stored in the spent fuel pools and maintain a minimum 5% margin to l

criticality with up to 95% BORAFLEX dissolution. Gaps in the BORAFLEX panels were detected but were limited in size to approximately 3 inches or approximately 2.4% of the j

total panel length (see Table 1 for details). Given the data and similarity of design and duty between the PBAPS Unit 2 and 3 spent fuel pools, sufficient margin exists to ensure spent i

fuel pool subcriticality in accordance with PBAPS Units 2 and 3 Technical Specification 4.3.1.b which states:

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The spent fuel storage racks are designed and shall be maintained with K-

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effective less than or equal to 0.95 if fully flooded with unborated water, i

which includes an allowance for uncertainties as described in Section 10.3 of i

the UFSAR.

Futum Actions to be Performed as a Consequence of the BADGER Test 4

(As a result of the BADGER Test results, a Nonconformance Report was generated to provide a tracking mechanism for actions / analyses performed.)

1.

Perform a video scan of the PBAPS Unit 2 spent fuel storage cell wrapper plates associated with locations JJ-30 and MM-30 to characterize the nature of the differences between damaged and reworked storage cells and normal cells by September 1,1997. The final disposition of JJ-30 and the reworked storage cells (MM-30, A-40, DD-46, EE-51, NN-07 and BBB-25) shall be based on the results of the video examination.

2.

Perform a records search to identify all PBAPS Unit 3 reworked storage cells for disposition by Reactor Engineering in a manner similar to the reworked storage cells associated with Unit 2 by February 28,1997.

3.

An analysis is currently being performed for the design-reference bundle which represents the highest reactivity that would be expected in the spent fuel pool. This 1

design-reference analyses will bound all fuel that will be placed in the spent fuel pool. This analyses will consider gaping and uniform BORAFLEX degradation.

This analysis will be completed by January 30,1997. Future actions for criticality margin maintenance and mitigation measures will be based on this analysis. The i

UFSAR will be revised following completion of this analysis to reflect this design-28 reference evaluation and to reflect the B areal density test results and implied changes to BORAFLEX Panel B' areal density and continuity.

Description of Further Proposed Actions PECO Energy will continue to monitor spent fuel pool coolant silica for concentration increases that may be indicative of accelerated BORAFLEX degradation.

4

b PECO Energy expects to enhance the RACKLIFE computer model for PBAPS Urdt 2 and fully develop the RACKLIFE computer model for Unit 3. The RACKLIFE models will be 1

maintained as a strategic planning tool to determine the appropriate time for additional B areal density measurements, blackness testing, or other monitoring / surveillance or when j

mitigation measures would be required.

PECO Energy has committed to continue support of the BORAFLEX Users Group Phase II activities. These activities include PECO Energy participation and/or review in the following activities: continued maintenance of the industry-wide BORAFLEX database, continuation of BORAFLEX special surveillance projects, RACKLIFE technical support, j

and BORAFLEX mitigation measures research and development.

j PECO Energy plans to evaluate BORAFLEX degradation mitigation measures such as burnup credit, selective spent fuel storage rack loading patterns (e.g. checkerboarding) and supplementary poison inserts or attachments. The implementation of these measures will be balanced against BORAFLEX degradation indications provided by industry experience, j

research, pool silica concentration trends, PBAPS surveillance test results and the PBAPS i

RACKLIFE pool performance computer model output.

Therefore, BORAFLEX i

degradation management is an ongoing process.

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PECO Energy will also evaluate the emerging results of EPRI research and development regarding spent fuel pool low concentration zine injection which has been noted to t

j significantly diminish BORAFLEX dissolution in the laboratory. This effort is expected to i

l continue through 1997.

f Spent Fuel Pool Silica Trends l

As requested by the Generic I.etter, Table 4 provides spent fuel pool silica data for PBAPS Units 2 and 3 respectively, from June,1986 to July,1996. The tables are organized in the f

j following manner for each Unit:

Sample Date The day on which the spent fuel pool coolant sample was analyzed MODES The operational condition of the associated reactor. The noted reactor conditions are Power Operation, Startup, Hot Shutdown, Cold Shutdown and Refueling as defined in Table 1.1-1 of PBAPS Technical Specifications.

Silica The concentration of spent fuel pool coolant reactive silica (SiO ) in 2

parts per billion.

1 Silica concentrations in the spent fuel pool vary with time. This can be attributed to factors noted previously:

5

2 1.

Seasonal variation of service water - cooler ambient temperatures tend to lead to cooler pool operating temperatures resulting in a reduction in BORAFLEX dissolution.

l 2.

Refueling - the addition and mixing of Reactor Water Storage Tank and reactor coolant water tend to dilute the measured silica in the spent fuel pool.

j A gradual increasing trend of silica levels in the spent fuel pool has been observed over the course of several years.

A sustained increasing trend in pool silica concentrations incons6ent with previous seasonal / refueling changes would elicit further actions by PBAPS 4

plant staff. Further actions may include (but not limited to) the following:

1.

Estimation of potentially accelerated BORAFLEX degradation using the RACKLIFE pool computer model; 2.

Review of design bases and evaluation of adequacy of suberiticality margin; 3.

Increased frequency of poison panel surveillance testing; 4.

Reconfiguration and/or re-analysis of spent fuel storage; 5.

Hardware mitigation such as insertable poison fixtures or re-racking.

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Boraflex/ Wrapper Configuration - Plan

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[ Undamaged /Unreworked Cells)

Panel ID Dose Areal Den. Scan Depth Gaps-size / location

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(Rads) - (gm/cm'2)

(in. from top)

(in./in. from top)

OO34S 1.30E+09

-0.0252 140 2.1/7.5 OO34E 1.30E+09 0.0253 139 2.3/8 JJ30S 4.00E+09 0.0244 132 2.5/106.5 DD30E 3.50E+09 0.0261 145 1.9/49,0.9/102 Il33S 4.30E+09 0.0267 142 3.4/27.5 ll33E 2.80E+09 0.0267 143 1.8/48.5,1.0/125 KK33W 3.80E+09 0.0269 139 0.6/25.5, 0.5/64.5, <0.5/80.5, 0.6/90.5 EE31S 3.10E+09 0.0249 145

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<0.5/86.5, <0.5/105.5 Y35N 0.00E+00 0.0239 140 Y35W 0.00E+00 0.024

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Table 2 i

PBAPS Unit 2 Boraflex BADGER Test Data

[ Reworked Cells]

I PanelID Dose Areal Den. Scan Depth Gaps-size / location

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(Rads)

(gm/cm^2)

(in, from top)

(in./in. from top)

MM30N 4.00E+09 0.0207 132 MM30W 3.90E+09 0.02 133

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l Table 3 PBAPS Unit 2 Boraflex BADGER Test Data

[ Damaged Wrapper Plate Suspect]

I Panel ID Dose Areal Den. Scan Depth Gaps-size / location

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(Rads)

(gm/cm'2)

(in. from top)

(in./in from top)

JJ30E 3.60E+09 0.0189 104 1.0/2.5 1

  • X, Y coordinate followed by compass orientation i

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,.,e Tabla 4 - Przch Bottom Fuel Pool Silica PBAPS 2 PBAPS 3 Samole Date OPCON Silica (oob)

OPCON Silica (oob) 05-Jun-86 Power Ops 125 Power Ops 120 12-Jun-86 Power Ops 120 Power Ops 110 19-Jun-06 Cold SD 138 Power Ops 128 26-Jun-80 Cold SD 160 Power Ops 130 04-Jul-86 Power Ops 140 Power Ops 130 09-Jul-86 Power Ops 170 Power Ops 140 16-Jul-86 Power Ops 170 Power Ops 140 24-Jul-86 Power Ops 108 Cold SD 104 31-Jul-86 Power Ops 175 Cold SD 140 06-Aug-86 Power Ops 180 Power Ops 153 21-Aug-86 Cold SD 210 Cold SD 130 28-Aug-86 Cold SD 210 Cold SD 140 10-Sep-86 Power Ops 220 Power Ops 150 18-Sep-86 Power Ops 230 Cold SD 140

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25-Sep-86 Power Ops 240 Power Ops 130 02-Oct-86 Cold SD 280 Power Ops 150 09-Oct-86 Startup 300 Startup 150 16-Oct-86 Startup 350 Power Ops 150 23-Oct-86 Power Ops 300 Power Ops 140 30-Oct-86 Power Ops 335 Power Ops 142 05-Nov-86 Power Ops 300 Cold SD 130 12-Nov-86 Power Ops 350 Power Ops 150 20-Nov-86 Power Ops 360 Power Ops 135 04-Dec-86 Power Ops 410 Power Ops 105 10-Dec-86 Power Ops 425 Power Ops 120 17-Dec-86 Power Ops 440 Power Ops 100

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24-Dec-86 Power Ops 600 Power Ops 115 01-Jan-87 Power Ops 440 Cold SD 120 l

08-Jan-87 Power Ops 500 Startup 130 15-Jan-87 Power Ops 330 Power Ops 86 22-Jan-87 Power Ops 410 Power Ops 112 29-Jan-87 Power Ops 115 Power Ops 96 12-Feb-87 Power Ops 420 Power Ops 110 19-Feb-87 Power Ops 800 Power Ops 100 26-Feb-87 Power Ops 440 Power Ops 100 04-Mar-87 Power Ops 400 Power Ops 110 12-Mar-87 Power Ops 400 Startup 80 18-Mar-87 Refueling 325 Cold SD 80 25-Mar-87 Refueling 135 Cold SD 105 01-Apr-87 Refueling 162 Cold SD 122 08-Apr-87 Refueling 200 Cold SD 95 22-Apr-87 Refueling 120 Cold SD 50 29-Apr-87 Refueling 295 Cold SD 112 06-May-87 Refueling 340 Cold SD 13-May-87 Refueling 360 Cold SD 115 20-May-87 Refueling 500 Cold SD 120 26-May-87 Refueling 445 Cold SD 90 03-Jun-87 Refueling 510 Cold SD 132

-t Tabla 4 - PIach Bottom Fu:1 Pool Silica 4

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PBAPS 2 PBAPS 3 Samole Date OPCON Silica (oob)

OPCON Silica foob) l 10-Jun-87 Refueling 520 Cold SD 135 17-Jun-87 Refueling 600 Cold SD 140 24-Jun-87 Refueling 330 Cold SJ 150 29-Jun-87 Refueling 340 Cold SD 07-Jul-87 Refueling 320 Cold SD 150 14-Jul-87 Refueling 350 Cold SD 180 29-Jul-87 Refueling 340 Cold SD 200 03-Aug-87 Refueling 470 Cold SD 230 11-Aug-87 Refueling 450 Cold SD 210 18-Aug-87 Refueling 482 Cold SD 220 25-Aug-87 Refueling 500 Cold SD 225 02-Sep-87 Refueling 500 Cold SD 250 08-Sep-87 Refueling 610 Cold SD 270 15-Sep-87 Refueling 540 Cold SD 190 23-Sep-87 Refueling 750 Cold SD 245 29-Sep-87 Refueling 520 Cold SD 230 07-Oct-87 Refueling 800 Cold SD 230 12-Oct-87 Refueling 1070 Refueling 155 20-Oct-87 Refueling 730 Cold SD 135 27-Oct-87 Refueling 1090 Refueling 155 04-Nov-87 Refueling -

620 Refueling 160 11-Nov-87 Refueling 1000 Refueling 175 16-Nov-87 Refueling 780 Refueling 155 29-Nov-87 Refueling 760 Refueling 155 09-Dec-87 Refueling 800 Refueling 185 16-Dec-87 Refueling 1050 Refueling 160 29-Dec-87 Refueling 750 Refueling 175 04-Jan-88 Refueling 720 Refueling 170 12-Jan-88 Refueling 800 Refueling 200 18-Jan-88 Refueling 1000 Refueling 210 27-Jan-88 Refueling 850 Refueling 190 03-Feb-88 Refueling 700 Refueling 125 08-Feb-88 Refueling 1000 Refueling 170 16-Feb-88 Refueling 1060 Refueling 156 24-Feb-88 Refueling 1050 Refueling 195 02-Mar-88 Refueling 800 Refueling 200 10-Mar-88 Refueling 920 Refueling 260 17-Mar-88 Refueling 720 Refueling 250 22-Mar-88 Refueling 700 Refueling 230 29-Mar-88 Refueling 700 Refueling 250 06-Apr-88 Refueling 760 Refueling 270 13-Apr-88 Refueling 840 Refueling 280 20-Apr-88 Refueling 800 Refueling 250 27-Apr-88 Refueling 820 Refueling 230 04-May-88 Refueling 760 Refueling 280 11-May-88 Refueling 970 Refueling 360 18-May-88 Refueling 780 Refueling 330 25-May-88 Refueling 420 Refueling 320

Tabla 4 - Psich Bottom Fu:1 Pool Silica PBAPS 2 PBAPS 3 Samole Date OPCON Silica foob)

OPCON Silica (nob) 01-Jun-88 Refueling 420 Refueling 340 09-Jun-88 Refueling 400 Refueling 400 16-Jun-88 Refueling 420 Refueling 370 23-Jun-88 Refueling 440 Refueling 370 30-Jun-88 Refueling 480 Refueling 350 06-Jul-88 Refueling 480 Refueling 400 13-Jul-88 Refueling 460 Refueling 420 20-Jul-88 Refueling 530 Refueling 380 27-Jul-88 Refueling 600 Refueling 500 03-Aug-88 Refueling 610 Refueling 350 09-Aug-88 Refueling 620 Refueling 350 16-Aug-88 Refueling 700 Refueling 325

'22-Aug-88 Refueling 710 Refueling 350 29-Aug-88 Refueling 320 Refueling 900 06-Sep-88 Refueling 580 Refueling 350 12-Sep-88 Refueling 740 Refueling 310 20-Sep-88 Refueling 740 Refueling 340 27-Sep-88 Refueling 780 Refueling 320 05-Oct-88 Refueling 600 Refueling 200 12-Oct-88 Refueling 560 Refueling 350 20-Oct-88 Refueling 800 Refueling 330 26-Oct-88 Refueling 740 Refueling 300 02-Nov-88 Refueling 660 Refueling 290 08-Nov-88 Refueling 720 Refueling 330 15-Nov-88 Refueling 720 Refueling 300 23-Nov-88 Refueling 700 Refueling 350 30-Nov-88 Refueling 760 Refueling 340 07-Dec-88 Refueling 620 Refueling 350 14-Dec-88 Refueling 740 Refueling 380 22-Dec-88 Refueling 680 Refueling 340 29-Dec-88 Refueling 750 Refueling 350 06-Jan-89 Refueling 565 Refueling 290 11-Jan-89 Refueling 725 Refueling 375 19-Jan-89 Refueling 710 Refueling 360 27-Jan-89 Refueling 710 Refueling 360 03-Feb-89 Refueling 730 Refueling 375 11-Feb-89 Refueling 760 Refueling 340 19-Feb-89 Refueling 710 Refueling 340 26-Feb-89 Refueling 740 Refueling 320 06-Mar-89 Refueling 710 Refueling 320 13-Mar-89 Refueling 810 Refueling 325 17-Mar-89 Refueling 840 Refueling 340 23-Mar-89 Refueling 800 Refueling 340 30-Mar-89 Refueling 675 Refueling 340 07-Apr-89 Refueling 685 Refueling 340 14-Apr-89 Refueling 730 Refueling 340 21-Apr-89 Refueling 680 Refueling 330 28-Apr-89 Refueling 720 Refueling 340 i

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Ttbla 4 - Puch Bottom Fuil Pool Silica 4

PBAPS 2 PBAPS 3 Sample Date OPCON Silica (Dob)

OPCON Silica (Dob)

{

06-May-89 Startup 710 Refueling 330

}

15-May-89 Startup 640 Refueling 310 j

22-May-89 Startup 710 Refueling 360 30-May-89 Power Ops 695 Refueling 400 i

07-Jun-89 Power Ops 640 Refueling 360 j

14-Jun-89 Power Ops 740 Refueling 360 21-Jun-89 Power Ops 720 Refueling 350 l

29-Jun-89 Power Ops 750 Refueling 325 j

07-Jul-89 Power Ops 900 Refueling 340 13-Jul-89 Power Ops 610 Refueling 315 21-Jul-89 Power Ops 840 Refueling 310 l

28-Jul-89 Startup 740 Refueling 335 i

04-Aug-89 Power Ops 800 Refueling 285 1

10-Aug-89 Power Ops 840 Refueling 300 17-Aug-89 Power Ops 980 Refueling 300 1

25-Aug-89 Power Ops 850 Refueling 180 l

01-Sep-89 Power Ops 960 Refueling 185 08-Sep-89 Power Ops 775 Refueling 220 13-Sep-89 Power Ops 770 Refueling 215 21-Sep-89 Power Ops 875 Refueling 200 l

27-Sep-89 Power Ops 940 Refueling 190 04-Oct-89 Power Ops 1000 Refueling 960 i

11-Oct-89 Startup 980 Refueling 185 18-Oct-89 Power Ops 850 Refueling 190 25-Oct-89 Power Ops 1060 Refuehng 170 01-Nov-89 Power Ops 840 Refueling 200

{

08-Nov-89 Power Ops 960 Refueling 180 j

15-Nov-89 Power Ops 800 Refueling 140 1'

22-Nov-89 Power Ops 990 Refueling 185 28-Nov-89 Cold SD 935 Startup 185

~

06-Dec-89 Power Ops 869 Cold SD 205 l

15-Dec-89 Power Ops 860 Power Ops 143 l

22-Dec-89 Cold SD 898 Power Ops 208 I

27-Dec-89 Power Ops 905 Power Ops 164 03-Jan-90 Power Ops 864 Power Ops 147 10-Jan-90 Power Ops 901 Power Ops 155 15-Jan-90 Power Ops 890 Power Ops 164 22-Jan-90 Power Ops 866 Power Ops 149 i

29-Jan-90 Startup 883 Power Ops 186 1

05-Feb-90 Power Ops 804 Power Ops 186 12-Feb-90 Power Ops 886 Power Ops 173 j

19-Feb-90 Power Ops 896 Power Ops 201 1

26-Feb-90 Power Ops 935 Power Ops 217

{

07-Mar-90 Cold SD 871 Power Ops 199 i

14-Mar-90 Refueling 319 Power Ops 159 j

21-Mar-90 Refueling 887 Power Ops 200

{

28-Mar-90 Cold SD 856 Power Ops 197 j

04-Apr-90 Cold SD 863 Power Ops 178 i

7y-gy g

-up e

  • etr$ 9 y9+w q

-w-

5,wv

'e.

l Tcbis 4 - Puch Bottom Fu:1 Pool Silica PBAPS 2 PBAPS 3 Sample Date OPCCN Silica (oob)

OPCON Silica foob) 11-Apr-90 Cold SD 852 Power Ops 183 18-Apr-90 Cold SD 756 Power Ops 171 25-Apr-90 Cold SD 631 Power Ops 189 02-May-90 Power Ops 889 Power Ops 188 11-May-90 Power Ops 750 Power Ops 121 18-May-90 Power Ops 780 Power Ops 130 25-May-90 Power Ops 881 Power Ops 187 01-Jun-90 Power Ops 884 Power Ops 183 08-Jun-90 Power Ops 880 Power Ops 226 15-Jun-90 Power Ops 901 Power Ops 183 22-Jun-90 Power Ops 646 Power Ops 146 29-Jun-90 Power Ops 924 Power Ops 187 06-Jul-90 Power Ops 865 Power Ops 555 13-Jul-90 Power Ops 938 Power Ops 189 20-Jul-90 Power Ops 686 Power Ops 201 27-Jul-90 Power Ops -

973 Power Ops 202 03-Aug-90 Power Ops 820 Startup 186 10-Aug-90 Power Ops 987 Power Ops 151 j

17-Aug-90 Power Ops 1044 Power Ops 211 24-Aug-90 Power Ops 1044 Power Ops 229 31-Aug-90 Power Ops 1035 Power Ops 234 07-Sep-90 Startup 1000 Power Ops 236 14-Sep-90 Power Ops 993 Power Ops 247 21-Sep-90 Power Ops -

1072 Power Ops 240 28-Sep-90 Power Ops 1048 Power Ops 236 05-Oct-90 Power Ops 1087 Power Ops 257 12-Oct-90 Power Ops 1010 Power Ops 283 19-Oct-90 Power Ops -

1096 Power Ops 265 25-Oct-90 Power Ops 1074 Power Ops 354 31-Oct-90 Power Ops 1023 Refueling 269 07-Nov-90 Power Ops 844 Refueling 276 14-Nov-90 Power Ops 1020 Cold SD 270 J

21-Nov-90 Cold SD 971 Cold SD 223 28-Nov-90 Power Ops 742 Power Ops 251 06-Dec-90 Power Ops 995 Power Ops 264 14-Dec-90 Power Ops 970 Power Ops 261 21-Dec-90 Power Ops 1050 Power Ops 303 28-Dec-90 Power Ops 1084 Power Ops 316 03-Jan-91 Power Ops 851 Power Ops 261 4

10-Jan-91 Power Ops 997 Power Ops 299 17-Jan-91 Refueling 872 Power Ops 294 24-Jan-91 Refueling 455 Cold SD 298 31-Jan-91 Refueling 495 Power Ops 333 06-Feb-91 Refueling 521 Power Ops 223 13-Feb-91 Refueling 405 Power Ops 20-Feb-91 Refueling 428 Power Ops 346 27-Feb-91 Refueling 437 Power Ops 400 06-Mar-91 Refueling 385 Power Ops 462

. _ -.. _ ~.. -..

9

3 b.

Ttble 4 - Prach Bottom Fu:1 Pool Silica i

1 j

PBAPS 2 PBAPS 3 Samole Date OPCON Silica (oob)

OPCON Silica foob) i 13-Mar-91 Refueling 400 Power Ops 430 20-Mar-91 Refueling 403 Power Ops 465 26-Mar-91 Refueling 388 Power Ops 529 01-Apr-91 Refueling 393 Power Ops 432 08-Apr-91 Refueling 427 Power Ops 481 i

16-Apr-91 Refueling 420 Power Ops 484 24-Apr-91 Startup 402 Power Ops 476 01-May-91 Power Ops 496 Power Ops 430 j

08-May-91 Cold SD 397 Cold SD 555 l

15-May-91 Cold SD 479 Cold SD 634 l

22-May-91 Startup 501 Cold SD 630-l 29-May-91 Power Ops 493 Startup 602 j

05-Jun-91 Power Ops 653 Power Ops 701 12-Jun-91 Cold SD 590 Power Ops 700

{

19-Jun-91 Power Ops 640 Power Ops 790

~26-Jun-91 Power Ops 681 Power Ops 807 03-Jul-91 Power Ops 746 Power Ops 855 l

10-Jul-91 Power Ops 682 Hot SD 862 l

17-Jul-91 Power Ops 770 Power Ops 918 24-Jul-91 Power Ops 750 Power Ops 884 31-Jul-91 Power Ops 784 Power Ops 946 07-Aug-91 Cold SD 816 Power Ops 827 14-Aug-91 Power Ops 802 Power Ops 979 j

21-Aug-91 Power Ops 858 Power Ops 1113 j

28-Aug-91 Power Ops 869 Power Ops 1134 04-Sep-91 Power Ops 882 Power Ops 1127 11-Sep-91 Power Ops 903 Power Ops 1029 l

19-Sep-91 Power Ops 875 Retueling '

1483 25-Sep-91 Power Ops 774 Refueling 1071 01-Oct-91 Power Ops 933 Refueling 432 09-Oct-91 Power Ops 971 Refueling 432 21-Oct-91 Cold SD 974 Refueling 387 28-Oct-91 Power Ops 938 Refueling 363 04-Nov-91 Power Ops 835 Refueling 358 13-Nov-91 Power Ops 973 Refueling 362 20-Nov-91 Power Ops 960 Refueling 253 27-Nov-91 Power Ops 955 Refueling 206 03-Dec-91 Power Ops 975 Refueling 192 11-Dec-91 Cold SD 950 Refueling 126 18-Dec-91 Cold SD 900 Refueling 171 26-Dec-91 Power Ops 832 Refueling 168 03-Jan-92 Power Ops 807 Refueling 154 10-Jan-92 Power Ops 709 Startup 167 17-Jan-92 Power Ops 655 Power Ops 141 24-Jan-92 Power Ops 657 Power Ops 161 03-Feb-92 Power Ops 695 Power Ops 193 l

10-Feb-92 Power Ops 686 Power Ops 195

)

17-Feb-92 Power Ops 695 Power Ops 209 i

vi.,

  • Tabl3 4 - Prach Bottom Fu:1 Pool Silica PBAPS 2 PBAPS 3 Samole Date OPCON Silica (oob)

OPCON Silica (Dob) 24-Feb-92 Power Ops 615 Power Ops 166 03-Mar-92 Power Ops 571 Power Ops 148 09-Mar-92 ~

Power Ops 671 Power Ops 235 16-Mar-92 Power Ops 507 Power Ops 220 22-Mar-92 Power Ops 625 Power Ops 248 29-Mar-92 Cold SD 649 Power Ops 236 06-Apr-92 Startup 767 Power Ops 327 i

13-Apr-92 Power Ops 611 Power Ops 273 20-Apr-92 Power Ops 655 Power Ops 293 27-Apr-92 Power Ops 615 Power Ops 170 04-May-92 Power Ops 717 Power Ops 364 11-May-92 Power Ops 680 Power Ops 339 18-May-92 Power Ops 700 Power Ops 413 25-May-92 Cold SD 680 Power Ops 381 01-Jun-92 Power Ops 727 Power Ops 356 08-Jun-92 Power Ops 672 Power Ops 381 15-Jun-92 Power Ops 490 Power Ops 725 24-Jun-92 Power Ops 732 Power Ops 541 1

01-Jul-92 Power Ops 769 Power Ops 266 08-Jul-92 Power Ops 831 Hot SD 598 15-Jul-92 Power Ops 822 Hot SD 649 22-Jul-92 Cold SD 823 Cold SD 696 29-Jul-92 Startup 830 Power Ops 716 j

05-Aug-92 Power Ops 881 Power Ops 776 12-Aug-92 Power Ops 925 Power Ops 776 19-Aug-92 Power Ops 933 Power Ops 830 26-Aug-92 Power Ops 916 Power Ops 858 02-Sep-92 Power Ops 929 Power Ops 894 09-Sep-92 Power Ops 978 Power Ops 780 16-Sep-92 Refueling 891 Power Ops 955 23-Sep-92 Refueling 317 Power Ops 981 30-Sep-92 Refueling 306 Power Ops 984 07-Oct-92 Refueling 296 Power Ops 984 14-Oct-92 Refueling 269 Power Ops 1021 21-Oct-92 Refueling 291 Cold SD 996 28-Oct-92 Refueling 292 Cold SD 974 04-Nov-92 Refueling 325 Cold SD 1013 11-Nov-92 Refueling 218 Cold SD 972 18-Nov-92 Refueling 267 Power Ops 1003 25-Nov-92 Refueling 302 Power Ops 1014 01-Dec-92 Refueling 305 Power Ops 1036 09-Dec-92 Refueling 305 Power Ops 996 16-Dec-92 Power Ops 203 Power Ops 908 23-Dec-92 Power Ops 348 Power Ops 1037 30-Dec-92 Power Ops 362 Power Ops 1045 06-Jan-93 Cold SD 368 Power Ops 900 13-Jan-93 Cold SD 352 Power Ops 1085 20-Jan-93 Power Ops 377 Power Ops 999

..m. _ _ _._._. _. _

9 l 7,

  • b v

!4 Tabla 4 - Pcach Bottorn Fuel Pool Silica

^

i i

i

~

PBAPS 2 PBAPS 3 l

Samole Date OPCON Silica foob)

OPCON Silica foob) i a

27-Jan-93 Power Ops 411 Power Ops 1032 03-Feb-93 Power Ops 409 Power Ops 1015 j

10-Feb-93 Power Ops 408 Power Ops 984 17-Feb-93 Power Ops 442 Power Ops 1020 i

24-Feb-93 Power Ops 459 Power Ops 1021 t

j 03-Mar-93 Cold SD 340 Power Ops 1042 10-Mar-93 Cold SD 456 Cold SD 992 j

17-Mar-93 Power Ops 436 Startup 1010 24-Mar-93 Power Ops 465 Power Ops 1037 t

31-Mar-93 Power Ops 479 Power Ops 1025 07-Apr-93 Power Ops 502 Power Ops 1063 l

14-Apr-93 Power Ops 502 Power Ops 1034 i

j 21-Apr-93 Power Ops

'513 Power C ps 969 1

28-Apr-93 Startup 478 Power Ops 985 l

)

05-May-93 Power Ops 518 Power Ops 960 j

12-May-93 Power Ops 517 Power Ops 976 j

19-May-93 Power Ops 601 Power Ops 1073 i

l 26-May-93 Power Ops 593 Power Ops 1056 j

02-Jun-93 Power Ops 628 Power Ops 1327 09-Jun-93 Power Ops 586 Power Ops 860 j

16-Jun-93 Power Ops 674 Power Ops 1153 j

23-Jun-93 Power Ops 720 Power Ops 1144

{

30-Jun-93 Power Ops 731 Power Ops 1145 1

07-Jul-93 Power Ops 713 Refueling 1075 l-14-Jul-93 Power Ops 508 Refueling 331 21-Jul-93 Power Ops 805 Power Ops 453

}

28-Jul-93 Power Ops 698 Power Ops 411 04-Aug-93 Power Ops 862 Power Ops 456 11-Aug-93 Power Ops 570 Power Ops 400 f

18-Aug-93 Startup 659 Power Ops 409 l

25-Aug-93 Power Ops 756 Power Ops 452 f

01-Sep-93 Power Ops 1181 Power Ops 449 08-Sep-93 Power Ops 1186 Power Ops 513 15-Sep-93 Power Ops 821 Power Ops 440 22-Sep-93 Power Ops 1222 Refueling 211 j

29-Sep-93 Power Ops 1188 Refueling 206 j

06-Oct-93 Cold SD 852 Refueling 214 13-Oct-93 Power Ops 1080 Refueling 230 l

20-Oct-93 Power Ops 1203 Refueling 228 27-Oct-93 Power Ops 1143 Refueling 209 03-Nov-93 Power Ops 1198 Refueling 272 j

10-Nov-93 Power Ops 1235 Refueling 285 j

17-Nov-93 Power Ops 1297 Power Ops 284 j

24-Nov-93 Power Ops 1007 Power Ops 285 01-Dec-93 Power Ops 1232 Power Ops 477 j-08-Dec-93 Power Ops 1096 Cold SD 535 1

15-Dec-93 Power Ops 1116 Startup 627 l

22-Dec-93 Power Ops Power Ops 746 i

i

e

d, Tabl3 4 - P;Ich Bottom Fu:1 Pool Silica PBAPS 2 PBAPS 3 Samole Date OPCON Silica (oob)

OPCON Silica (oob) 29-Dec-93 Power Ops 1194 Power Ops 05-Jan-94 Power Ops 950 Power Ops 853 12-Jan-94 Power Ops 1130 Power Ops 610 19-Jan-94 Power Ops 1115 Power Ops 876 26-Jan-94 Power Ops 1155 Power Ops 805 02-Feb-94 Power Ops 1118 Power Ops 836 j

09-Feb-94 Power Ops 924 Power Ops i

16-Feb-94 Power Ops 999 Power Ops 822 l

23-Feb-94 Power Ops 974 Power Ops 801 02-Mar-94 Power Ops 1026 Power Ops 869 09-Mar-94 Power Ops 1039 Power Ops 911 16-Mar-94 Power Ops 1116 Power Ops 900 23-Mar-94 Power Ops 1068 Power Ops 988 30-Mar-94 Power Ops 1056 Power Ops 1016 i

06-Apr-94 Power Ops 958 Power Ops 933

, 13-Apr-94 Power Ops 1026 Power Ops 960 20-Apr-94 Power Ops 1040 Power Ops 999 27-Apr-94 Power Ops 996 Power Ops 950 04-May-94 Power Ops 1033 Power Ops 1033 11-May-94 Power Ops 1018 Power Ops 964 18-May-94 Cold SD 1051 Power Ops 997 25-May-94 Power Ops 1012 Power Ops 968 01-Jun-94 Power Ops 1017 Power Ops 961 08-Jun-94 Power Ops 1068 Power Ops 1004 15-Jun-94 Power Ops 1047 Power Ops 991 22-Jun-94 Power Ops 1100 Power Ops 1040 29-Jun-94 Power Ops 1100 Power Ops 1030 06-Jul-94 Power Ops 1102 Power Ops 1069 13-Jul-94 Power Ops 902 Power Ops 934 21-Jul-94 Power Ops 1148 Power Ops 1077 29-Jul-94 Power Ops 1038 Power Ops 964 05-Aug-94 Power Ops 1467 Power Ops 1102 12-Aug-94 Power Ops 1242 Power Ops 1167 19-Aug-94 Power Ops 1224 Power Ops 1110 26-Aug-94 Power Ops 1247 Power Ops 1124 02-Sep-94 Power Ops 1221 Power Ops 1182 09-Sep-94 Power Ops 1137 Power Ops 1019 16-Sep-94 Power Ops 1153 Power Ops 1019 23-Sep-94 Refueling Power Ops 1105 30-Sep-94 Refueling Power Ops 1134 07-Oct-94 Refueling Power Ops 965 14-Oct-94 Refueling 229 Cold SD 1072 21-Oct-94 Refueling 275 Power Ops 1136 28-Oct-94 Power Ops 382 Power Ops 1168 04-Nov-94 Power Ops 298 Power Ops 990 11-Nov-94 Power Ops 336 Power Ops 1018 18-Nov-94 Power Ops 391 Power Ops 1112 25-Nov-94 Power Ops 355 Power Ops 1010

t-&

2 Tabl3 4 - Pccch Bottom Fu:1 Pool Silica PBAPS 2 PBAPS 3 Samole Dale OPCON Silica (oob)

OPCON Silica foob) 02-Dec-94 Power Ops

$51 Power Ops 1082 09-Dec-94 Power Ops 327 Power Ops 897 16-Dec-94 Power Ops 493 Power Ops 1025 22-Dec-94 Power Ops 532 Power Ops 1042 30-Dec-94 Power Ops 489 Power Ops 882 06-Jan-95 Power Ops 510 Power Ops 981 13-Jan-95 Power Ops 545 Power Ops 931 20-Jan-95 Power Ops 553 Power Ops 861 27-Jan-95 Power Ops 616 Power Ops 854 03-Feb-95 Power Ops 627 Power Ops 887 10-Feb-95 Power Ops 673 Power Ops 961 17-Feb-95 Power Ops 715 Power ops 919 24-Feb-95 Power Ops 666 Power Ops 771 03-Mar-95 Power Ops 713 Power Ops 805 10-Mar-95 Power Ops 673 Power Ops 710 17-Mar-95 Power Ops 694 Power Ops 737 24-Mar-95 Power Ops 729 Hot SD 751 31-Mar-95 Power Ops 836 Power Ops 833 07-Apr-95 Power Ops 558 Power Ops 728 14-Apr-95 Power Ops 779 Power Ops 782 21-Apr-95 Power Ops 850 Power Ops 804 28-Apr-95 Power Ops 803 Power Ops 767 05-May-95 Power Ops 803 Power Ops 760 12-May-95 Power Ops 835 Power Ops 767 19-May-95 Power Ops 578 Power Ops 771 26-May-95 Power Ops 880 Power Ops 802 02-Jun-95 Power Ops 905 Power Ops 810 09-Jun-95 Power Ops 982 Power Ops 898 16-Jun-95 Power Ops 904 Power Ops 650 23-Jun-95 Power Ops 916 Power Ops 809 30-Jun-95 Power Ops 904 Power Ops 798 07-Jul-95 Power Ops 979 Power Ops 820 14-Jul-95 Power Ops 1031 Power Ops 858 21-Jul-95 Power Ops 912 Power Ops 649 28-Jul-95 Power Ops 1135 Power Ops 787 04-Aug-95 Power Ops 1020 Power Ops 765 11-Aug-95 Power Ops 1216 Power Ops 888 18-Aug-95 Power Ops 1110 Power Ops 815 25-Aug-95 Power Ops 1133 Power Ops 795 01-Sep-95 Power Ops 1203 Power Ops 903 08-Sep-95 Power Ops 1245 oower Ops 915 15-Sep-95 Power Ops 1268 Power Ops 650 22-Sep-95 Power Ops 1227 Power Ops 899 29-Sep-95 Power Ops 1244 Refueling 343 06-Oct-95 Power Ops 1172 Refueling 265 13-Oct-95 Power Ops 864 Refueling 249 20-Oct-95 Power Ops 1252 Startup 262 27-Oct-95 Power Ops 1240 Power Ops 348

4

p..d*

Table 4 - Peach Bottom Fuel Po:1 Silica 1

PBAPS 2 PBAPS 3 Sample Date OPCON Silica foob)

OPCON Silica foob) j 03-Nov-95 Power Ops -

1254 Power Ops 351 10-Nov-95 Power Ops 1219 Power Ops 324 17-Nov-95 Power Ops 1315 Power Ops 400 24-Nov-95 Power Ops 1296 Power Ops 445 01-Dec-95 Power Ops 1210 Power Ops 358 i

08-Dec-95 Startup 1126 Power Ops 418 j

15-Dec-95 Power Ops 1443 Power Ops 487 26-Dec-95 Power Ops 1251 Power Ops 459 01-Jan-96

' Power Ops 1062 Power Ops 396 08-Jan-96 Power Ops 1210 Power Ops 440 15-Jan-96 Power Ops 1200 Power Ops 444

(

22-Jan-96 Power Ops 1200

' Power Ops 463 l

30-Jan-96 Power Ops 1137 Power Ops 492 07-Feb-96 Power Ops 904 Power Ops 441 14-Feb-96 Power Ops 1195 Power Ops 449 21-Feb-96 Power Ops 1160 Power Ops 434 28-Feb-96 Power Ops 1201 Power Ops 475 06-Mar-96 Power Ops 931 Power Ops 513 13-Mar-96 Power Ops 915 Power Ops 315 20-Mar-96 Power Ops 1142 Power Ops 397 27-Mar-96 Power Ops 1367 Power Ops 547 03-Apr-96 Power Ops 1298 Power Ops 502 10-Apr-96 Power Ops 1221 Power Ops 487 17-Apr-96 Power Ops 1274 Power Ops 541 24-Apr-96 Power Ops 1409 Power Ops 584 01-May-96 Power Ops -

1077 Power Ops 469 10-May-96 Power Ops 1258 Power Ops 421 17-May-96 Power Ops 1085 Power Ops 470 24-May-96 Power Ops 1220 Power Ops 548 31-May-96 Power Ops 1248 Power Ops 580 07-Jun-96 Power Ops 1279 Power Ops -

590 14-Jun-96 Power Ops 1252 Power Ops 580 21-Jun-96 Power Ops 1300 Power Ops 524 28-Jun-96 Power Ops 1270 Startup 665 08-Jul-96 Power Ops 1187 Power Ops 510 15-Jul-96 Power Ops 1380 Power Ops 710

-a--,r

-ww-w y-c y

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