ML18059A972

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Summary of 940421 Meeting W/Util Re Planned Blackness Tests to Verify Integrity of Boraflex in Plant SFP & Contingencies in Case of Unfavorable Test Results.List of Attendees Encl
ML18059A972
Person / Time
Site: Palisades Entergy icon.png
Issue date: 05/02/1994
From: Hsia A
Office of Nuclear Reactor Regulation
To:
Office of Nuclear Reactor Regulation
References
NUDOCS 9405040075
Download: ML18059A972 (17)
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Text

{{#Wiki_filter:UNITED STATES e NUCLEAR REGULATORY COMMISSION WASHINGTON. D.C. 20555-0001 May 2, 1994 Docket No. 50-255 LICENSEE: Consumers Power Company FACILITY: Palisades Nuclear Generating Plant

SUBJECT:

SUMMARY

OF MEETING HELD ON APRIL 21, 1994, WITH CONSUMERS POWER COMPANY ON PALISADES BORAFLEX ISSUE Pn April 21, 1994, members of the NRC st~ff met with rep~esentatives of Consum~rs Power Company (CPCo) to discuss the Palisades planned blackness tests to verify the integrity of the Boraflex in Palisades' spent fuel pool (SFP) and the contingencies in case of unfavorable test results.* Enclosure 1 lists the meeting attendees. is a copy of the handout from. the meeting. The discussions included the following topics:

  • The discovery of the degradation o,f the Palisades Boraflex surveillance
  • coupons.*
  • Westinghouse performed criticality analysis assuming no Boraflex and 0 ppm boron in the SFP.

This result was used in the current SFP Region 2 loading scheme.

  • Loading of the dry casks to provide necessary spaces for blackness tests.
  • Blackness test methodology.
  • Contingency plans to accommodate Cycle 12 full core offload.

Palisades has selected a staggered loading of sections in Region 2 racks.

  • Schedule for dry cask loading and blackness tests. The blackness tests are scheduled to begin in July 1994 after loading four additional casks.
  • Long-term contingency plans.

The licensee is scheduled to begin loading additional dry storage casks in June.1994 to provide necessary spaces in the SFP for the blackness tests. The licensee has the following actions: I. Provide NRC ~ith informati6n regarding the 5/19, 5/20 meeting on Briraflex sponsored by W~stinghouse. 9405040075 940502 PDR ADOCK 05000255 P PDR May 2, 1994

2. Notify NRC prior to the blackness test.
3. Summarize the test results in an update to the associated Licensee Event Report.

Enc 1 osures: *

l. Meeting attendees
2.

Meeting haridout cc: w/enclosures

  • .See next page OFFICE LA:P031 NAME (Jamerson DATE 4 /'Z-'(,/94 Original signed by L. Olshan for:

Anthony H. Hsia, Project Manager Project Directorate III-1 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation SRXB AHsia:gll TCollins FILENAME: G:\\WPD CS\\PALISADE\\PABLACKN.MTS

Consumers Power Com.y cc: Mr. Thomas J. Palmisano Plant General Manager Palisades Plant 27780 Blue Star Memorial Highway Covert, MI 49043 Mr. David W. Rogers Plant Safety and Licensing Director Palisades Plant 27780 Blue Star Memorial ~ighway Covert, Michigarr 49043 M. I. Miller, Esquire Sidley & Austin 54th Floor One First National Plaza Chicago, Illinois.60603 Mr. Thomas A. McNish, Secretary Consumers Power Company 212 West Michigan Avenue

  • Jackson, Michigan 49201 Judd L. Bacon, Esquire*

Consumers Power Company 212 West Michigan Avenue *

  • Jackson, Michigan 49201 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532~4351 *

,Jerry Sarno Townshi~ Supervisor Covert Township 36197 M-140 Highway Covert, Michigan 49043 Office of.the Governor Room 1 - Capitol Building Lansing, Michigan 48913 U.S. Nuclear Regulatory Commission Resident Inspector Office Palisades Plant 27782 Blue Star Memorial Highway Covert, Michigan 49043 Palisades Plant Nuclear !ilities and Environmental Monitoring Section Office Division of Radiological Health Department of Public Health 3423 N. Logan Street -P. O. Box 30195 Lansing, Michigan 48909 Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trowbridge 2300 N Street, N. W. Washington DC 20037 Alora Davis Commitment Tracking System Coordinator Palisades Plant _ Consumers Power Company 27780 Blue Star Memorial Hwy. Covert, Michigan 49043-9530 Mr. Robert A. Fenech Vice President, Nuclear Operations Consumers Power Company Palisades Plant 27780 Blue Star Memorial Highway

  • covert, Michigan* 49043 April 1994

MEETING BETWEEN NRC AND CONSUMERS POWER

  • REGARDING PALISADES.BORAFLEX
  • April 21, 1994 Mark Banks Rob Radulovich Bud Gerling David Rogers Dick Smedley Guy Packard Dave Studley.

Kevin Graney Larry Kopp

  • Larry Phillips Kris Parczewski Anthony Hsia*

ORGANIZATION CPCo/Reactor Engineering CPCo/Physics CPCo/R&SA CPCo/Safety & Licensing CPCo/Licensing CPCo/R&SA NUS Bechtel/Serch Licensing NRR/SRXB NRR/SRXB NRR/EMCB NRR/DRPW ENCLOSURE 1

. MEETING

SUMMARY

FOR ITING HELD ON 4/20/94 DISTRIBUTION W/ENCLOSURES 1 AND 2 Dock~t File NRC & LPDRs PD31 Reading W. Kropp, RIII M. Parker, SRI A. Hs.ia DISTRIBUTION WITH ENCLOSURE 1 ONLY W. Russell/F.. Miraglia, 12/G/18 L. Reyes, Acting J. Roe J. Zwolinski L.. B. Marsh C. Jar]lerson. OGC E. Jorda~ ~NBB-3701 T. Collins, 8E23 L. Phillips, 8E23 L. Kopp, 8E23 K. Parczewski, 704 .Ar.RS (10) W. De an*~ 17IGI21 \\.J. Kropp, RII I cc: Licensee & Service List DATED: May 2, 1994

UNITED STATES

  • NUCLEAR REGULATORY COMMISSION Docket No. 50-255 WASHINGTON. D.C. 20556-0001 May 2, 1994 LICENSEE: Consumers Power Company FACILITY: Palisades Nuclear Generating Plant

SUBJECT:

SUMMARY

OF MEETING HELD ON APRIL 21, 1994, WITH CONSUMERS POWER COMPANY ON PALISADES BORAFLEX ISSUE On April 21, 1994, members of the NRC staff met with representatives of Consumers Power Company (CPCo) to discuss the Palisades planned blackness tests to verify the integrity of the Boraflex in Palisades' spent fuel pool (SFP) and the contingencies in case of unfavorable test results. lists the meeting attendees. is a copy of the handout from the meeting. The discussions included the following topics:

  • The discovery of the degradation of the Palisades Boraflex surveillance coupons.
  • Westinghouse performed criticality analysis assuming no Boraflex and 0 ppm boron in the SFP.

This result was used in the current SFP Region 2 loading scheme.

  • Loading of the dry casks to provide necessary spaces for blackness tests.
  • Blackness test methodology.
  • Contingency plans to accommodate Cycle 12 full core offload.

Palisades has selected a staggered loaelting of sections in Region 2 racks.

  • Schedule for dry cask loading and blackness tests. The blackness tests are scheduled to begin in July 1994 after loading four additional casks.
  • Long-term contingency plans.

The licensee is scheduled to begin loading additional dry storage casks in June 1994 to provide necessary spaces in the SFP for the blackness tests. The licensee has the following actions:

1. Provide NRC with information regarding the 5/19, 5/20 meeting on Boraflex sponsored by Westinghouse.

040007 ~yo~o'io6B)

  • May 2, 1994
2. Notify NRC prior to the blackness test.
3. Summarize the test results in an update to the associated Licensee Event Report.

Enclosures:

1.

Meeting attendees

2.

Meeting handout cc: w/enclosures. See next page OFFICE

  • LA: PD3 l NAME CJamerson Original signed by L. Olshan for:

Anthony H. Hsia, Project Manager Project Directorate III-1 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation SRXB AHsia:gll TCollins FILENAME: G:\\WPD CS\\PALISADE\\PABLACKN.MTS ., \\.' **;* (. j -,.. ~...

    • I>

1** d, ~* '. ~\\ r "~ ---~ 'j !~ _",)* '* -~,; 'l ' ~ 1_.. t _t -~ :'f ~ '. i,, / ;_'; ~ l l l - i i* ~1 *--* . ;I ;. "'I., __ ~' ~..,,- ~

Consumers Power Company cc: Mr. Thomas J. Palmisano Plant General Manager Palisades Plant 27780 Blue Star Memorial Highway Covert, MI 49043 Mr. David W. Rogers Plant Safety and Licensing Director Palisades Plant 27780 Blue Star Memorial Highway Covert, Michigan 49043 M. I. Miller, Esquire Sidley & Austiil 54th Floor One First National Plaza Chicago, Illinois 60603 Mr. Thomas A. McNish, Secretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 ,Jerry Sarno Township Supervisor Covert Township 36197 M-140 Highway Covert, Michigan 49043 Office of the Governor Room 1 - Capitol Building Lansing, Michigan 48913 U.S. Nuclear Regulatory Commission Resident Inspector Office Palisades Plant 27782 Blue Star Memorial Highway Covert, Michigan 49043 Palisades Plant Nuclear Facilities and Environmental Monitoring Section Office Division of Radiological Health Department of Public Health 3423 N. Logan Street P. 0. Box 30195 Lansing, Michigan 48909 Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trowbridge 2300 N Street, N. W. Washington DC 20037 Alora Davis Commitment Tracking System Coordinator Palisades Plant Consumers Power Company 27780 Blue Star Memorial Hwy. Covert, Michigan 49043-9530 Mr. Robert A. Fenech Vice President, Nuclear Operations Consumers Power Company Palisades Plant 27780 Blue Star Memorial Highway Covert, Michigan 49043 . April 1994

MEETING BETWEEN NRC AND CONSUMERS POWER REGARDING PALISADES BORAFLEX Mark Banks Rob Radul ovich Bud Gerling David Rogers Dick Smedley Guy Packard Dave Studley Kevin Graney Larry Kopp Larry Phi 11 ips Kris Parczewski Anthony Hsia April 21, 1994 ORGANIZATION CPCo/Reactor Engineering CPCo/Physics CPCo/R&SA CPCo/Safety & Licensing CPCo/Licensing CPCo/R&SA NUS Bechtel/Serch Licensing NRR/SRXB NRR/SRXB NRR/EMCB NRR/DRPW ENCLOSURE 1

1 LJ PALISADES BORAFLEX UPDATE

  • Purpose of meeting.

- Provide the NRC staff an update on the Boratlex issue at Palisades. - Discusa mdhodology and schedule for Blackness testing. - Discusa contingency for unfavorable Blackness test results. - lmplications on spent fuel pool management 2 0 Background

  • Boraflex swveillance coupons were tested in August 1993.

- Results showed severe degradation of the Boraflex. A1 this point it is unclear to what extent the degradation observed in the surveillance coupons is representative of the racks. - Report written summarizing LER 93.()07.() 1.

  • The current loading of Region 2 is bounded by a Westinghouse perfonned criticality analysis assuming no Boraflex.
  • Blackness testing of the Westinghouse Boraflex Poisoned racks (Region 2) is scheduled for July 1994.

3 ~ Spent Fuel Pool Configuration 4 CJ Blackness Test

  • Approx. 20% of available cells will be tested.

.:. Includes region of acceleraled exposure. - Tests cells in all three areas of Region 0. - Envelopes the coupon locations.

  • Test to be performed by Holtec International Corp.

s a Blackness Test (Cont.)

  • Requires background radiation levels <20 R/hr.
  • Fuel assemblies can be no closer than 4 cells.
  • Minimwn 7x7 needs to cleared of fuel to test center cell.

6 GD Blackness Test Cells 7 CJ Test Methodology

  • Fast neutrons from 232Cfthermalized in water.
  • Neutrons backscatter in direction oftest tool.
  • Absorption occurs in absorber (Botaflex).
  • Gaps in absorber allow neutrons to reach detectors.

a Cl Test Procedure

  • Test tool is lowered and raised in rack cell.

- :uzcr neutron source. - 4 orthogooal BF> aeu1roll ~-

  • -*,,.. Vertically 1ravene cell at l ft/min.

- DetedDr response recorded Oii Slrip charts. 9 Cl Test Results

  • Will qualitatively determine the presence ofBoraflex poison.

..

  • Test generally capable of detecting 0.5 inch gaps.

ENCLOSURE 2

1 o c:l Current Loading Situation Ignoring Boraflex Problem

  • 1995 Reload (Cycle 12) is scheduled ten year ISi.
  • Full core offioad required.

- Current spaces = 13 - Required spaces = 249 - Desired spaces = 269

  • 1 1 Casks will be loaded in 1994 to provide the desired spaces.

11 c:l Spent Fuel Pool Options For Region 2 Asswning Boraflex Degradation is Confirmed by Blackness Testing 12 ~:l Options Considered to Accommodate Cycle 12 Full Core Offload

  • Temporary Credit for Soluble Boron.

- Still considered viable if needed.

  • Poison pins in instrument tubes.

- Preliminary studies of B,C and Hf show tha1 it is doubtful the required Joa.ding will be attainable relying solely on this method. 13 a Options (Cont.)

  • Credit for degraded concentration of Boraflex taken.

- Bumup requirements raised. Applicability is dependent on extent of degradation.

  • Assembly Poison sheets.
  • Re-Racking of Pool.
  • Staggered loading of Sections in Region 2 Racks (Chosen Option).

14 ~ Region 2 Loading 1 s c:l Full Core Oftload

  • Spaces Required in Region 1 = 224

- Cycle 11 Fuel = 204 Assemblies. - New Fuel = 20 Assemblies.

  • Total Spaces Available= 224 (Note: 45 Control Blades Placed In Region 2) 16 ':l Region l Loading
  • Initial Spaces= 6
  • Minimum Removed to Dry Cask Storage.

- 'l-{299-264).. 16

  • Total Removed to Region 2 = 202
  • Total Spaces Available= 224 17 w Region 2 Loading
  • At Most, 202 Assemblies Moved From Region 1 To Region 2.
  • Fuel Moves to Occur After Dry Cask Loading and Prior To Refueling Outage.

1 s a Schedule

19 c:J Discussion

  • Time needed to implement.

- Westingbou.sc will need Approx. 2 Montm.

  • If 1.5 fresh wt% <qWvalent Cl1I be raiched. ClllT'Cllt bumup curve could be used.
  • Proposal 1m been received anc1 wor1< 1m begun.

-.50..59 review of analysis will be performed. 20 C:l Discussion (Cont.)

  • No credit for the control rod blades is taken.
  • More spaces in Region 1 may be gained by:

- Keeping new fuel in canisters. - Filling one 7XI I Region 2 rack completely via current "NO BORAFLEX' procedures. 21 c:J Long Term Contingencies

  • Take Credit for Partially degraded Boraflex in Racks.

- Depends on the outcome of Blackness Testing.

  • Credit for Soluble Boron in SFP.

- CPCo will join CEOO initiative to take credit for 2.50 ppm.

  • Modify Existing Racks.

- Replace Boraflex with an altemate material.

  • 22 c:J Long Tenn Contingencies (Cont.)
  • Manage Pool with 3-0f-4 arrangement.
  • Utilize second l lxl l rack.

- Single Assembly Transfer.

  • Re-rack Region 2.

Spent Fuel Pool Configuration Cask Loading Area llxll

Blackness Test Cells 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 II Cells to be tested (32) l::::::::::,::*:I Additional Cells tested ( 19) fBlll!.I Boraflex Coupons remaining in SFP 1!11111111 Boraflex Coupons removed for testing NW ow PW QW

  • RW SW 1W uw xw YW zw

Region 2 Loading is 26 21 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 -~~GW II 11111

    • ~~HW

..IW *

  • 11*11*11*1111111 II 11*11 * ** JW 11*11111 II II 1111111 II KW 1111 111111*111111 II *1111 LW 1111 111111* II Ill 111111111111 -*

MW

  • 111111111111111 II II

.11 Control Blade (45) NW 1111 Ill 11111111111111 Control Blade (Spare) ( 1) ow

    • * -*
  • II II Empty Water Gap (8)

PW

  • 11 II 11*11111111

~ Not Available (4) QW

  • II ****--

II Fuel Assemblies (217) RW 11111111111111111 SW

  • 1111 1W

-* **11*11*11*

  • UW II II 111111 xw II 11*11 11*

YW zw

1994 DFS CASK LOADING SCHEDULE Page 1 of 1 411511994

  • FUEL INSPECTIONS/CRANE MODS FIELD PREPS I PRE-OP T~STING AND TRAINING Feb'94 Mar'94 Apr'94 May'94 Jun'94 Jul'94 Aug'94 Sep'94 Oct'94 Nov'94

..... MJ*- *-**. ... 1 *.. H******* -*..... ..... I.... --. &I&. i -. __ j... 1*..... I CASK#3 ... *--...1.. *-* *-- **-* -... ... 617 6118... - - --- I I CASK#4 CASK#5 -***.... 1--* *-**** --............. ..... 6'2G*** f2. -- I

  • - *-*. -***!--*--** -- -- -- -** -**.............. -714--1118-**

~ CASK#6 BLACKNESS TEST WEEK OF 7/18 I

      • -** **--* l-********-** *-*-*** -*-*** -**-*****-*-

...... ***-**** **--* --** *---1118**-*** **-**** -*-. ***-- ***-*- CASK#7 I -*-*****-*-*****-***-**--*****-******--***-**** ****-*............ -**-******-* **- ***--- **---*****-* ***-******--*....... ******* -*-*******-*1*--****-** *- **-***--*********-*........... ***-*** **-**** -***--*-***-*1'26 *118-****************-**** *-******-****-*******--** **-* --* **-**-***-- CASK #8 I CASK#9 CASK#10 CASK#11

  • CASK#12 CASK#13 LOS REMOVAL MOVE~FUEL/\\SSEMBLIES.FROM-*

REGION 1\\IOREGION 2 IN.SFP... ~l...

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          • . *-*. -- *-'1<<1'17

~-* MEETING

SUMMARY

FOR MEETING HELD ON 4/20/94 DISTRIBUTION W/ENCLOSURES 1 AND 2 Docket Fi 1 e* NRC & LPDRs PD3 l Reading W. Kropp, Riii M. Parker, SRI A. Hsia* DISTRIBUTION WITH ENCLOSURE 1 ONLY W. Russell/F. Miraglia, 12/G/18 L. Reyes, Acting J. Roe J. Zwolinski L. B. Marsh C. Jamerson OGC E. Jordan MNBB-3701 T. Collins, 8E23 L. Phillips, 8E23 L. Kopp, 8E23 K. Parczewski, 7D4 ACRS (10) W. Dean, 17/G/21 W. Kropp, Riii cc: Licensee & Service List ,,*\\ 'i. ~ *> ~- \\, '""~. '--':

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