ML18059A923

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Review of Palisades Nuclear Plant Ventilated Storage Cask Thermal Performance Monitoring
ML18059A923
Person / Time
Site: Palisades, 07201007  Entergy icon.png
Issue date: 03/31/1994
From: Prelewicz D
SCIENTECH, INC.
To:
NRC
Shared Package
ML18059A924 List:
References
CON-NRC-02-90-009, CON-NRC-2-90-9, FOIA-94-351 SCIE-NRC-225-94, NUDOCS 9404080034
Download: ML18059A923 (35)
v • d • e


Text

' l SCIE-NRC-225-94 REVIEW OF PALISADES NUCLEAR PLANT VENTILATED STORAGE CASK THERMAL PERFORMANCE MONITORING D. A. Prelewicz Prepared for U. S. Nuclear Regulatory Commission SCIENTECH Subcontract 16-910005-51, Modification No. 10 SAIC Prime Contract NRC-02-90-009, Task Order 22 March 1994 SCIENTECH, Inc.

11821 Park.lawn Dr.

Rockville, MD 20852 Attachment

TABLE OF CONTENTS Section

1. 0 OBJECTIVES

2.0 BACKGROUND

3.0 DESCRIPTION

OF REVIEW PROCESS 3.1 Document Review

3. 2 ISFSI Inspection
3. 3 Data Review 3.4 Industry Testin~ Program 4.0 REVIEW FINDINGS 4.1 Design Analysis 4.2 Thermal Performance Testing 4.3 Comparison of Test Data and Analysis 4.4 Quality Assurance 3

4 10 10 11 12 12 16 16 19 21 21 5.0 RESULTS AND CONCLUSIONS 24

6.0 REFERENCES

25 APPENDIX A REPRESENTATIVE THERMAL MONITORING DATA 26 APPENDIX B SAMPLE CERTIFICATE OF CALIBRATION 32 2

1.0 OBJECTIVES The Palisades Nuclear Plant Independent Spent Fuel Storage Installation (ISFSI) uses Sierra Nuclear Corporations (SNC) Vertical Shielded Canister (VSC-24) spent fuel storage system. This is the first use of the VSC-24 system. Consumer's Power Co. (CPC) began loading fuel into the VSC-24 casks on May 7, 1993 and placed the first cask in service on May 11, 1993. The Certificate of Compliance (Reference 1) for the VSC-24 casks requires that the thermal performance of the first cask placed in service be monitored and compared to design calculations for the actual heat load of the fuel. The objective of the special first cask test is to confirm cask thermal performance and provide base-line data. The special test was performed by Consumer's Power from May 11 through May 24, 1993. This special test was also performed from May 18 to June 13, 1993 for the second cask placed in service. The results are reported in Reference

2.

The purpose of this review is to examine the methodology, procedures and equipment used by CPC to perform the thermal monitoring tests, with the objective of determining whether the requirements stated in the Certificate of Compliance have been met. As a part of this effort, supporting design calculations for the 11. 94 kW heat load, included in Reference 2, were reviewed.

3

y

2.0 BACKGROUND

The VSC-24 consists of a concrete cask in the shape of a vertical cylinder, which has an interior cavity to accommodate a welded steel basket (Multi-assembly Sealed Basket-MSB) which contains up to 24 irradiated PWR spent fuel assemblies. The cylindrical cavity in the VSC is lined with steel plates, which also line air passages at the bottom and top of the cask. The air inlet passages at the bottom of the cask admit cooling air which flows over the surface of the MSB before rising out through the outlet passages at the top of the cask. Within the MSB, fuel assemblies are placed within individual storage sleeves. Heat is removed from the fuel elements by conduction and radiation in the inert gas (helium) atmosphere of the MSB. Heat is removed from the MSB surface by natural convection air flow through the cask, and radiation to the cask inner surface.

Thermal design aspects of Sierra Nuclear Corporation's VSC-24 System for irradiated fuel have previously been reviewed by the staff and found to be acceptable based upon conformance to the applicable sections of 10-CFR-72. The review addressed the adequacy of natural convection cooling to maintain fuel cladding and VSC concrete temperatures within acceptable limits during normal, off-normal and accident conditions. During normal operation, the analysis showed that the fuel and concrete temperature criteria would not be exceeded based upon a temperature difference between the inlet and outlet air temperature of less than 110 F at the full 24 kW heat load. The analysis assumed that all of the heat generated in the fuel was removed by the air flow and used the calculated increasing air temperature within the cask as a boundary condition for determining fuel and concrete temperatures. One limiting condition for operation which was placed upon t_he cask was that the equilibrium air temperature at the outlet of a *fully loaded cask not exceed ambient by more than 110 F.

It was further required that a first cask placed in service with a heat load of less than 24 kW, have its limiting temperature difference between outlet and ambient temperature compared to that predicted by design calculations performed using the same methodology and inputs as documented in the SER. Consumer's Power did not have fuel suitable for storage capable of generating the full capacity heat load of 24 kW.

Therefore, calculations were performed for the first and second casks and the results compared to measured temperature differences by Consumer's Power. The results are presented in Reference 2.

Daily outlet air temperature monitoring was also required so a permanent temperature measuring system was installed on each cask. Figure 2-1 shows several views of the temperature probe installation. It can be seen that the probe extends into the outlet duct and is attached to the outlet vent screen. A 2 inch by 4 inch temperature probe mounting plate covers a portion of the outlet vent area. Electrical cabling to the probe is run through a combination of rigid and flexible conduit to a junction box mounted to the outside surface of the cask. Figure 2-2 shows how the conduits are routed. Figure 2-3 shows the connection of the conduit to the junction box which contains jacks for reading the probes. A hand held detector is attached to each jack to read the 4

~*.

temperatures. Ambient temperature is measured inside of a weather box, a sketch of which is shown in Figure 2-4. Figures 2-1 through 2-4 are from taken from Consumers Power Document EDC-FC-864-24.

5

  • v Derail "A" lfl" Typ.

FIGURE 2-1 Temperature Probe Installation Section View

/

End V.ew 0

  • I Detail "B" Probe: Omega PR.-14-2-100-1/4"-12-E 23 GA Screen 3/8" Mounting Plale 1

1.0* Typ.

2Pl.

"' /

10 - 32 R.HMS 1 lW and Lock Washer 1/4" Typ. 2 Pl.

Hole for ui-NPT pipe Fiaing NO'IES:

1. All IO&ennces 10 I/la".

3/8" Plaie

2. Reference Drawin1 CVCC-24-004 6

EDC-FC-864-24 Page 1of4 Detail "A" Extension Cable:

3/C#l8 AWG Outdoor, direct burial (In Conduit)

Hole for 10 - 32 MS

  • v EDC-FC-864-24 Page 2 of 4 FIGURE 2-2 Top View of Cask Showing Conduits Cables to be run in I" rigid conduit down the side of the cask to the junction box See Detail "A" l" flex Conduit

\\

- IZl llO Vent Locations Cables to be run in 1" flex conduit around the top of the cask Lid of cask

~---~

I p;-~

t%

t%

~.

0 JJ 1"21 I/,

, /I Conduit grip and Hilti Kwik Bolt II NOTE: This is an example of a RTD which requires cables to run past iL The othen will only require a conduit fitting.

7

EDC-FC-864-24 Attachment l Page 3 of 4 FIGURE 2-3 Junction Box Installation Inside Junction Box 8

  • 32 X 3/4" RHMS with Lock Washers and Nuts Mount ro angle iron in box.

See Note2 APlJroximately 4

  • NOTE:
1. Foruse with the following:

Jack Panel TJP-1-6-U Note 1 L Exsension SemorCable: RSC-Rm-2-7-8

b. Saics 860 'Ibcnnome&er. 868 8
1. Rigid Conduit Dry Cask 1
  • Conduit Clip Hoffman Junction Box and accessories 0

~

I" Conduit "LB.

0/

0 l" Conduit Hub with Bushing.

1/4" X 1 3/4" SS Kwik Bolt ll-Hilti Anchor (4 Places)

Dry c.k Sunge Pad

2. Marerials:

L Screws SIN - 28

  • 87453 or equivalent
b. Lock Washers SIN
  • 28
  • 87.578 or equivalent
c. Nuts SIN
  • 28
  • 87370 or equivalent

EDC-FC-864-24 Page 4 of 4 FIGURE 2-4 Weather Box Installation Existing Junction Box and unistrut mounting assembly Approltimately 2.0 Meters NO'IE:

1. Materials:

L Screws SIN 87461 or equivalent

b. Loc:Jc Washers SIN 15363 or equivalent
c. Nuts SIN 87388 or equivalent 9

Wcatha Box Probe: Omega PR.-14-2-1()().l/4*-12-E Located inside the box.

Same Mounting plaie as shown on page one using 10 - 32 X 314*

RHMS, Loc:Jc Washers and Nuts. See NOie l

~

3IC#l8 AWGCable in conduit

  • New Hoffman Junction Box with Jack PMel as shown on page 2. May be mounted on other side of box.

Dry Cat SIDmge Pad

3.0 DESCRIPTION

OF REVIEW PROCESS Documentation describing the thermal analysis and special tests for the first cask (Reference 2),

provided by Consumer's Power Company, was reviewed prior to traveling to the Palisades plant to visit the ISFSI site. The analysis methods were compared to those used to perform the SER analysis and were found to be the same, except for addition of a form loss term in the air flow calculations to account for the flow obstruction by the temperature probes at the outlet vents.

The increased flow resistance due to the temperature probes is less than 0. 7 % of the total losses and will have an insignificant effect on cask performance. More detailed discussion of the design analysis for the reduced heat load is contained in Section 4.1.

An inspection of the ISFSI at the Palisades plant was performed on December 15, 1993. Dr.

Hi Bo Wang of the Nuclear Regulatory Commission assisted with the inspection. Meetings were held with the following individuals representing Consumer's Power Company, prior to visiting the ISFSI site:

Mr. Dick Smedley, Director of Licensing Mr. John Broschak, ISFSI Project Engineer Ms. Virginia Moceri, I&C Design Engineer The following NRC staff also participated in all or portions of the meetings and ISFSI inspection:

Dr. Tony Hsia, NRC Project Manager for the Palisades Plant Mr. Mike. Parke~, NRC Senior Resident

3. I Document Review Additional documentation was requested during the meetings. Consumer's Power promptly provided all of the requested material for inspection and also provided photocopies of any material desired for purposes of preparing this report.

Following is a list of the material provided at the meeting:

1.

PALlSADES NUCLEAR PLANT WORK INSTRUCTION No. WI-DFS-E-01, Rev. 0, "Installation of the Temperature Monitoring System on Ventilated Storage Cask",

9/27/93.

2.

PALlSADES NUCLEAR PLANT SPECIAL TEST PROCEDURE No. T-338, Rev. 0, "Thermal Performance Monitoring of the Ventilated Storage Casks", 5/20/93.

3.

PSN Drawing CVCC-24-001, Rev. 3, Sheet 1, CPC Drawing VEN-C-136B, Sheet 8, Rev. 2A, "Ventilated Concrete Cask (VCC) Assembly".

10

4.

PSN Drawing CVCC-24-004, Rev. 2, Sheet 1, CPC Drawing VEN-C-136B, Sheet 2, Rev. 3A, "Air Outlet Assembly".

5.

CPC Drawing E-42, Sheets No. 543 and 544, Rev. 0, "Conduit and Tray Notes, Symbols and Details".

6.

CPC Drawing M-649, Rev. 0, "Piping & Instrumentation Diagram Dry Fuel Storage Air Temperature Monitoring System".

7.

CPC Drawing E-618, Sheet No. 927, Rev. 0, "Connection Diagram Junction Box".

8.

CPC Certificate of Calibration for Omega Model 868 Temperature Indicator Serial No.

1'99074, M&TE ID No. 001249, Procedure No. IS-H-47, Rev. 0, 10/16/93.

In addition to the above documents, the complete record of raw thermal monitoring data was made available for review.

3. 2 ISFSI Inspection A tour of the ISFSI was provided by Consumer's Power staff. Operation of the thermal monitoring system was demonstrated during the tour. A hand held temperature indicator is plugged into a permanently installed jack located in a junction box on the cask outer surface.

A separate jack within the junction box is provided for each RTD temperature probe. There is one probe located at each outlet vent. As shown in Drawing VEN-C-136B (Reference 4), the temperature measurement. is made approximately one foot inside the outlet vent. Locating the

  • probe inside of the outlet passage minimizes mixing of the outlet air with outside air. Since mixing will lower the air temperature it is appropriate to measure the temperature at a location where little mixing would be expected under normal operating conditions.

During the inspection, sample measurements were made for each of the temperature probes on Cask 1.

Some time variation of the measurements on the order of a few degrees F was observed. This is to be expected given the random nature of flow fluctuations during natural convection. Also, there was a slight wind blowing at the time. Wind effects can also increase the natural fluctuations in air flow and outlet temperature. Sample measurements were also made on Cask 2.

Up to approximately eight feet off the pad (maximum reach without a ladder), there was no

  • discernable heating of the cask outer surface which was cold to the touch. This is consistent with VSC-17 test data discussed in Sections 3.4 and 4.1. Each inlet and outlet was covered with a screen as shown in the design drawings. Bird chiipers were installed to keep birds from the area. There was no evidence that birds were or had been in the ISFSI area. Flow into the inlets was discernable but did not appear strong enough to entrain particles of any significant size.

11

The ambient temperature is measured using the same type of RTD temperature probe located in an ambient temperature box. The National Weather Service approved ambient temperature box used was a Belfort Model 5-970A. This is a wooden box 22 inches by 33 inches by 33 inches with slats to allow communication of the inside and outside air. A separate junction box is provided for attaching the hand held temperature indicator. The weather box is located on one side of the pad.

3. 3 Data Review The complete record of thermal monitoring data was made available by Consumers Power for review. Copies were made of a small amount of representative data (included as Appendix A).

As shown in Appendix A, the raw data consists of hand written recordings of the temperature indicator readings on preprinted data sheets. The first type of completed data sheet shown in Appendix A was used for the initial thermal performance tests where comparisons to predicted air outlet temperatures were required.

Four data sheets for Cask 2 on four different days are shown. Note that there is typically a wide variation in the measured air temperatures at the four outlets. No consistent pattern could be found regarding which outlet had the highest or lowest air temperature. Variation of the outlet temperatures is caused by changes in wind speed and direction and also by random perturbations of the natural circulation flow. Perturbations of the air flow and affects of the wind would generally be expected to enhance heat removal by the air flow.

Note that the average outlet temperature is well below the predicted value in all cases. This is due to the conservative nature of the air flow calculations which determine the predicted average air outlet temperature. The calculations assume that all heat must be removed by the air flow.

In actuality some fraction of the heat generated in the fuel is removed by conduction through the cask walls, so the amount of heat which the air is assumed to remove is overestimated.

The last sheet in Appendix A shows a representative completed data sheet for the daily temperature monitoring program. Ambient temperature and outlet air temperature data for all of the loaded casks is recorded on the same sheet. Unlike the data sheet used for the initial test period, the time of day that the data was taken is not recorded.

3.4 Industcy Testine Proeram A very similar cask, the VSC-17, was tested with consolidated spent nuclear fuel at the Idaho Engineering Laboratory. The test program was sponsored by the Department of Energy (DOE),

the Electric Power Research Institute (EPRI) and Wisconsin Electric Power Company. Reference 6 documents the test program.

Temperature measurements were taken both within the multiassembly sealed basket and in the cask. Figures 3-1and3-2, taken from Reference 6, show measured axial and radial temperature profiles for the VSC-17 cask.

12

The VSC-17 test was conducted indoors so there were no wind effects. Nevertheless, the fully loaded cask has a surface temperature no more than 15°F above ambient, as shown in Figure 3-1.

It is not surprising that the VSC-24 casks at the Palisades ISFSI (which are located outdoors and have less than half of the design heat load) were cold to the touch, as discussed in Section 3.2.

Nevertheless, a significant amount of the total heat is being removed by conductfon through the concrete surface as shown by the calculation in Section 4.1.

Comparisons were made of test data against predictions of DOE's COBRA-SFS computer program. No comparisons were made to the SNC design analysis (Reference 5) for the VSC-24 cask. Nevertheless, the test data for this similar cask provide additional information regarding VSC system performance which is useful in evaluating the VSC-24 thermal monitoring data.

Section 4.1 discusses the design analysis for the reduced heat load performed for the VSC-24 casks. Information from the VSC-17 test program is used to estimate the amount of heat removed by conduction through the concrete cask.

13

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en c U2 1

FIGURE 3-1 Axial Temperature Profiles for VSC-17 Test (Helium Fill, Unblocked Vents - from Reference 6)

Temperature, °F 0

200 4CO 600 0

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LOCATION (TC Lance) w

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.::t.

  • --<>-*Surface Cl1
  • -~--liner c u

---0--MSB Surface

--+--MSB Basket (41

-+-Outer Fuel (1) 5

Outer Fuel (3)

~iddle Fuel (2)

-o-Midciie Fuel 151

~iddle Fuel (7)

-+-Center Fuel. (61

-Gamma Profile

300 u.

100 0

FIGURE 3-2 Radial Temperature Profiles for VSC-17 Test (Helium Fill, Unblocked Vents - from Reference 6) 6 TC lances 7 2/5 113 4 MSB 0

0.5 Radius. ft Temperature

,~:;;;:;'!!!~*~'

Measurement

'l/rCID;:;kl.:J>,. Locations Lonee Numbers Air Liner..,..f---- Concrete ------t 1

Radius, m 15 700 600 100 1.5

e 4.0 REVIEW FINDINGS 4.1 Design Analysis Reference 5 is the SNC design basis calculation for the air flow through the VSC-24 cask. This analysis was performed for the full 24 kW design heat load. Since the heat load for the first two casks placed in service at the Palisades plant was less than one half of the design heat load, a reanalysis was performed by CPC to obtain a prediction of the air flow and the air temperature rise for the actual heat load. This analysis is included in Reference 2. The purpose of the reanalysis was to determine the predicted temperature rise for the actual heat load for purposes of comparison of the predictions to measured data.

The original design calculations were performed with preliminary information and included a snow skirt which has since been eliminated. The total loss coefficient (Sum Kl A 2) due to flow friction was recalculated using information from the final construction drawings. The change in total loss coefficient from the original design (0.60408) to the recent reanalysis (0.61937) is very small (2.5 % increase). A review of the calculation of loss coefficients revealed that the result is slightly conservative.

The same axial heat flux profile was used in the reanalysis. This profile has a peak of 1.20 which compares favorably with calculated axial decay heat profiles and measured gamma activity profiles reported in Reference 6 Figure 3-14, included here as Figure 4-1.

The calculation of outlet air temperature by balancing friction losses against buoyancy driving head is characterized by a conservative assumption regarding the heat load removed by the air flow and an overestimation of the buoyancy force. The net result of these off setting factors is a calculation which remains conservative.

In the design calculation, it is assumed that all of the heat load is removed by the air flow.

Consideration of experimental data from the VSC-17 tests (Reference 6) shows that this is a very conservative assumption. The VSC-17 is a similar design to the VSC-24, so it is appropriate to examine this assumption in light of the VSC-17 data. Figures 4-6 and 4-7 of Reference 6, included here as Figures 3-1 and 3-2, show measured cask temperatures including temperatures at various elevations on the inside and outside surfaces of the cask. From these Figures it is estimated that an average 60°F temperature difference exists across the vertical concrete walls.

From this temperature difference and the thermal conductivity of the concrete (k - taken as 0.87 Btu/hr-ft-°F, from Reference 7), the total heat loss through the vertical walls (Q) can be calculated from the following equation (Reference 8):

16

FIGURE 4-1 Predicted and Measured Axial Decay Heat Profiles (from Reference 6) 300 E

u c

5!

200 ii

~

w 100 Measured Gamma

~(Turkey Point)

--*--Predicted Decay Heat (Surry) 0 0 2 0.4 0 6 0 8 1.0 1.2 1 4 1 6 Relalive Vaiue 17

Q = 2 1t L k (Tin - Tom) / ln(Root I Rm) where Lis the effective height of the cask for heat transfer, Tin (T00J is the inside (outside) cask surface temperature and Rm (Root) is the cask inside (outside) radius. Taking the effective height as 15 feet and using Roo1 = 105 inches and Rm = 85 inches from Reference 6, gives Q = 23,282 Btu/hr, which is approximately 6.8 kW. The total heat load during the tests was 14.9 kW (Reference 6). Hence only 14.9 - 6.8 = 8.1 kW of heat remained to be removed by the air flow.

It is reasonable to assume that the same percentage of heat is removed by conduction through the concrete in the VSC-24 casks. Given the 11.94 kW heat load for the first VSC-24 cask, the heat which remains to be removed by the air flow (Qair) is:

Qair = 11.94 x 8.1 I 14.9 = 6.50 kW The effect of this much lower heat load to be removed by the air is off set by an overestimation of the buoyancy driving force in the design calculation.

The differential pressure due to buoyancy forces is:

where

£\\p = p £\\TIT and the integral is from the* cask inlet elevation to the cask outlet elevation.

In the SNC and CPC design analyses, the integral f L\\p dz is approximated by multiplying the height difference from the inlet to the outlet by the integrand £\\p = p £\\ T / T evaluated as follows: average values of p and Tare used but Tout - Tin is used to approximate £\\T. Actually

£\\T varies from zero to Tout - Tin as z traverses the distance from the inlet to the outlet. The maximum value of £\\Tis used is used in the design analysis when approximating the value of the integral. A more accurate approximation would be to use an average value of £\\T, that is, (T001 -

T;J/2. This has the effect of reducing the effective height of the stack by a factor of 2.

An EXCEL spreadsheet was set up to verify the CPC design calculations of outlet temperature given in Reference 2. A spot check for several values of the ambient temperature yielded identical values to the CPC results.

This same spreadsheet was then used to calculate outlet temperature for the 70°F ambient temperature case of Reference 2, except that 1.) the heat load removed by air flow was reduced 18

d'

  • 'L
  • to 6.5 *kW to account for heat removed by conduction through the concrete, and 2.) the stack height was reduced by a factor of 2 (i.e., the more accurate approximation for the buoyancy force integral was used). This yielded a calculated outlet temperature of 116.2°F, which is less than the design method, and in better agreement with the measured data. The design method therefore remains conservative overall due to the conservative assumption that all of the heat is removed by the air flow.

Figure 4-2 shows the outlet temperatures predicted by CPC using the.design analysis method compared to measured data. This Figure is taken from Reference 2. Results of predictions using the alternate method discussed above are also shown. The EXCEL spreadsheet was used for the alternate calculations which were performed using the reduced heat load removed by air flow and the more accurate approximation of the buoyancy force integral.

Points were calculated approximately every 20°F ambient temperature to obtain the alternate calculation curve shown.

It can be seen that the alternate prediction lies close to the data, with some data points on the curve, and some points conservatively below the curve. One could speculate that the points below the curve are those for which air flow through the cask was enhanced by wind effects.

4.2 Thermal Performance Testing Documentation regarding the thermal monitoring test was reviewed. This included the Work Instruction (Reference 9) covering installatiOn of the temperature monitoring system, the Special Test Procedure (Reference 10) for conducting the monitoring and test data. The 19 page work instruction appeared to be reasonably complete, including. a list of required materials, tagg~g requirements, requirements for independent verification and checkout(testing), checklists to be completed, appropriate notes and cautions and acceptance *criteria. It is noted that the date of approval of the Work Instruction was 9/27/93, some time after the installation for the first two casks had been completed.... Since this procedure will be used for installation of the temperature monitoring system on all of the remaining casks, it is presumed that the experience gained from the initial installation has been incorporated into the final procedure.

The Special Test Procedure, like the Work Instruction, appears to be reasonably complete.

Appendix A contains sample completed data sheets from the procedure. Data obtained through June 13, 1993 using the procedure for casks VSC-1 and VSC-2 are shown in the following tables, along with predicted outlet temperatures.

Tables 4-1 and 4-2 were provided by Consumer's Power. The data was obtained using acceptable procedures and conforms to the surveillance requirements in Section 1.2.3 of the Certificate of Compliance.

19

FIGURE 4-2 VSC-1 Cask Thermal Performance Data VSC-24 THERMAL PERFORMANCE {CASK CVCC-24-oo~

220 200 180 u..

~160 w

a:

J 140 1--:

~ 120 w

n.

~ 100 W.

I-t-

80 w

5 60 0

40 20 0

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10 20 30 40 50 60 70 Rfl

!MJ 100 110 120 t:JO AMBIENT/INLET TEMPERATURE f'F) 20

4.3 Comparison of Test Data and Analysis A comparison of measured and predicted cask outlet temperature for the first cask was provided by Consumer's Power in Reference 2.

Additional comparisons for the second cask were provided during the site visit. The data and predictions are given in Tables 4-1and4-2 for casks VSC-1 and VSC-2, respectively.

The average of the measured outlet temperatures is well below that predicted by the design calculation. Hence, the requirements of Section 1. 2. 3 of the Certificate of Compliance have been satisfied.

4.4 Qyality Assurance The installation of thermal monitoring equipment and the thermal monitoring testing have been conducted by Consumer's Power following documented Quality Assurance Procedures, which were reviewed during the facilities visit. Sample completed test data sheets were obtained and are included in Appendix A.

Quality Assurance documentation regarding calibration of the temperature indicators used to perform the daily monitoring was requested and obtained.

Appendix B is a sample of a Certificate of Calibration for an instrument used to perform the monitoring.

All quality assurance documentation requested of Consumer's Power was provided promptly during the site visit. Review of the documentation indicated that quality assurance procedures

  • are being implemented in a satisfactory manner.

21

TABLE 4-1 VSC-1 THERMAL PERFORMANCE DATA FROM T-338 AVG.

PREO.

CHANGE DATA INLET OUTLET OUTLET FROM POINT DATE TIME TEMP. {Fl TEMP.IF\\

TEMP. (Fl PREO. {F")

I 5/11/93 2119 59 98.6 113 14.4 2

5/12/93 0925 59 89.25 113 23.75 3

S/13/93 1217 56 93.75 110 16.25 4

5/14/93 0900 54 88 108 20 5

5/15/93 0837 53 84.3 106

21. 7 6

5/16/93 0845 51.6 96.3

!OS 8.7 7

5/17/93 0900 50

91. 6 103 11.4 8

5/18/93 1145 60.5 98.25 115 16.75 9

5/19/93 0940 47.8 92.7 101 8.3 10 5/20/93 1114 56.6 90.4 111 20.6 11 5/21/93 1100 53 96 106 10 12 5/22/93 0845 60 95.8 115 19.2 13 5/23/93 0815 58.8 102.6 113 10.4 14 5/24/93 1215 60 93 115 22 15 5/25/93 1215 52

81. 75 102 20.25 16 5/26/93 1330
63. 8
91. 5.

118 26.5 17 5/27/93 0905 57 106 Ill 5

18 5/28/93 1026 SO.I 102.4 105 2.6 19 5/29/93 0927 48.4 97.l 105 7.9 20 5/30/93 1105 65 104 120 16 21 5/31/93 0830 45 84 98 14 --

22 6/01/93 1035 48.6 76.4 105 28.6 23 6/0Z/93 1330 54.3 90.2 110 19.8 24 6/03/93 1310

53. I 100. I 105 4.9 25 6/04/93 0851 51.9 99.9 105 5.1 26 6/05/93 1135 52 91.5 105 13.S 27 15/06/93 1115 62 98 117 19 28 6/07/93 1155 65.9 110.8 120 9.2 29 6/08/93 1035 63 108.7 115 6.3 30 6/09/93 1120 70.3 102.15 125 22.85 31 6/10/93 lllO 63.7 104.8 117 12.2 32 6/11/93 1005 71 114 125 11 33 6/12/93 1035 72 115.3 130 14.7 34 6/13/93 0835 65.5 116.9 121 4.1 22 AVERAGE:
13. 91

TABLE 4-2 VSC-2 THERMAL PERFORMANCE DATA FROM T-338 AVG.

PRED.

CHANGE DATA INLET OUTLET OUTLET FROM POINT DATE TIME TEMP. (Fl TEMP. f F'l TEMP. (Fl PRED. (Fl 1

5/18/93 1930

'9 85.6 105 19.,

2 5/19/93 0920 48.8 86.7 104 17.3 3

5/20/93 1132 56.4 86.3 110 23.7 4

5/21/93 1110 53 89 105 16 5

5/22/93 0855 6D 92.9 115 22.1 6

5/23/93 0815 58.5 lOD.9 115 14.1 7

5/24/93 1215 60 93 II 5 22 8

5/25/93 1215 52 80 102 22 9

5/26/93 1330

63. 8 92.25 118 25.75 10 5/27/93 0902 57 106 IIl 5

11 5/28/93 1D21 50.1 99.9 105 5.1 12 5/29/93 0925 48.4 95.3 105 9.7 13 5/30/93 1107 65 103.75 120 16.25 14 5/31/93

. 0830' 45

.. 80 98 18 15 6/01/93 1030 48.6 76.17 105 28.83 16 6/02/93 1330 54.3 89.8 IIO 20.2 17 6/03/93 1310 53.1 98.5 105 5

18 6/04/93 0853

51. 9 98.75 105 6.25 19 6/05/93 1130 52 87.5 105 17.5 20 6/06/93 1118 62 100 II 7 17 21 6/07/93 1155 65.9 109.7 120 10.3 22 6/08/93 1035 63 104.8 115 10.2 23 6/09/93 1120 70.3 10'1. 65 125 23.35 24 6/10/93 1117 63.7 105.75 117 11.25 25 6/11/93 1008 71 113.4 125 11.6 26 6/12/93 1040 72 112.7 130 17.3 27 15/13/93 0840 65.5 115.85 121 5.15 AVERAGE:
15. 57 23

5.0 RESULTS AND CONCLUSIONS A review of the installation and test procedures for the VSC thermal monitoring program was conducted, including a site visit on December 15, 1993. Documentation of test procedures, work instructions, instrument calibrations and test data were found to be in good order, both in terms of content and completeness. Drawings of the thermal monitoring system were consistent with the actual installation as determined by a walkdown of the ISFSI site.

Calculations performed using the design method (Reference 2) submitted by the licensee were reviewed and found to give conservative results. Predictions of outlet air temperature resulting from the calculations were greater than the measured values. This indicates that the thermal design method is conservative in its prediction of air temperature rise though the cask.

Requirements of the Certificate of Compliance (Section 1.2.3) regarding thermal monitoring of the first cask have been satisfied. This provides assurance that the concrete and fuel temperature limits will not be exceeded.

24

6.0 REFERENCES

1.

Certificate of Compliance 72-1007 for the Ventilated Storage Cask (VSC-24) for Irradiated Fuel.

2.

D. W. Rogers, Consumers Power Co. Docket 50-255 License DPR Palisades Plant - "First Cask Thermal Performance - ISFSI", Accession No. 9306210193 June 10, 1993.

3.

Science Applications International Corp. "Safety Evaluation Report for Pacific Sierra Nuclear Topical Report on the Ventilated Storage Cask Systems for Irradiated Fuel, Revision 2, SAIC-90/1389, October 1990.

4.

PSN Drawing CVCC-24-001, Rev. 3, Sheet 1, CPC Drawing VEN-C-136B, Sheet 8, Rev. 2A, "Ventilated Concrete Cask (VCC) Assembly".

5.

Pacific Sierra Nuclear Associates Design Calculation WEP-0109, Rev. 3 "VSC-24 Airflow Analysis" 2/15/90.

6.

M. A. McKinnon, et. al., "Performance Testing and Analyses of the VSC-17 Ventilated Concrete Cask", EPRI TR-100305, May 1992.

7.

Sierra Nuclear.Corporation, "Topical Report on the Ventilated Storage Cask System",

Revision 2, July 1990.

8.

J. R. Welty, C. E. Wicks and R. E. Wilson, "Fundamentals of Momentum, Heat and Mass Transfer", John Wiley and Sons, Inc., 1969, p. 246.

9.

PALISADES NUCLEAR PLANT WORK INSTRUCTION No.~': D~S-E-01, Rev.

0, "Installation of the Temperature Monitoring System on Ventilated Storage Cask",

9/27/93.

10.

PALISADES NUCLEAR PLANT SPECIAL TEST PROCEDURE No. T-338, Rev.

0, "Thermal Performance Monitoring of the Ventilated Storage Casks", 5/20/93.

25

~

0 c:>

~

E-t

~

~

i

\\0 N

~

~

~

I

~

e

~

~

~

I e

~

Q 0

  • ~

~

~

i

~

\\0 N

~

ffi

~

< I

~

F 4-8 i.":'!

9.ia VSC Number __

\\<.,..ll.-C'"""}-....._ ___

Date 6. ) -C,.J Time J)]p Pretest Briefing Required ?

DATA SHEET Pree No T-338

  • Revision 0 Page l of 1 Measurement Instrument Serial No.

r*.h I I'°'

Calibration Date S- -1.:: -.: ~

Determined by: ~~:=:.=::;.:.;~~-

Date: lo-l-CJ ~

Date: l. -l-°13 Shi ft Supervisors Authorization:

RWP Number:

4 ':. - 0 OC'1 Measured Air Inlet Temperature:

-4~ 3
  • F Measured Air Outlet Temperature: A.

S!-~

  • F
8.

'i X'., }=

  • F*
c.

to~.~

  • F
0.

5 7,0

  • F Average Of Air Outlet Temperatures:

fe'/.i

  • F Predicted Air Outlet T111Perature (Attachment 3) ___

tr_a ___ *F The Average Air Outlet Temperature does not exceed The Predicted Air Outlet Temperature.

Auxiliary Operator Date e..-

I I_,_

I r

F l{-82 DATA SHEET Proc No T-338 Attachment Z Revision 0 Page l of l VSC Number....;Q~0_2-____ _

~/s-}s~

Measurement Instrument Serial No.

Date oo 1 r&7 Time I ( "?' 0 Calibration Date Pretest Briefing Required ? @; NO

  • Determined by: ~

Shift Supervisors Authorization:

~~

RWP Number:

5"3 -000 ~

Measured Air Inlet Temperature:

Measured Air Outlet Temperature: A.

8.
c.

D.

Average Of Air Outlet Temperatures:

~9'J0 54,~

cc. y j4, "

1*(,~

-ti.<

  • F
  • F
  • F
  • F
  • F
  • F Date:

Date:

Predicted Air Outlet T911Perature (Attachment 3) -.....1../..... 0_< ___ *F The Average Air Outlet Temperature does not exceed The Predicted Air Outlet Temperature.

db

/ J,,

t(lt<

~

/~)i1; Auxiliary Operator Date

I I

I j

~

F4*82 VSC Number

<!:JC> ~

Date 6 q 3 Time 11 '-o Pretest Briefing Required ?

Determined by:

Shift Supervisors Authorization:

RWP Number:

c1 J tv-o- (

Measured Air Inlet Temperature:

Measured Air Outlet Temperature: A.

8.
c.
0.

Average Of Air Outlet Temperatures:

DATA SHEET

?roe No T-338 Revision o*

Page 1 of 1 Measurement Instrument Serial No.

Cc'.? ti~ 7 Calibration Date S-1.>-'7 3 7.;;.c..;,., _Ji:.____

  • F t'Cll. 3
  • F

~2. I

  • F Lt 3*
  • 7
  • F 10.::,.:r
  • F

£QI* *f

  • F Date: Co/c:i/cc3 Date: Cof ccf <"<3 e.,..

Predicted Air Outlet Temperature (Attachment 3) _1;....'2.

., ___ *F The Average Afr Outlet'Temperature does not exceed The Predicted Air Outlet Temperature.

~

16-9-93 Auxiliary Operator Date

vsc Number __ C=--Jo

___ z Date Ce c I 3, G.:3 Time 08'-fO Pretest Briefing Required ?

DATA SHEET Proc No T-338 Attachment z Revision 0

  • Page 1 of 1 Measurement Instrument Serial No.

00 1167 Calibration Date S- /3-9_-?

Determined by:

Date:G1 ( 5, Cr 3 Date: W.1 I~ 4 J Shift Supervisors Authorization:

RWP Number: 9 3- 000~*

Measured Air Inlet Temperature:

Measured Air Outlet Temperature: A.

/19. 0

. *F B.

(/il

  • 2
  • F C.*~

//~8-F

0.

//8. 7

  • F Average Of Air Outlet Temperatures:

/JS', ~S *F Predicted Air Outlet TH1perature (Attachment l) __

/c_'r:i_/_* __ *F The Average Air Outlet Temperature does not exceed The Predicted Air Outlet Temperature.

Date'

I I

I l

,J.-

1f.<13 THERML TEMPERATURE RE.AQINGS Of YEKTIL.ATED SI08AGE CASK Pree No 0/WO

  • I Attichment 1J Revision 42 Pige l of 7 Hondiy

@ @. *~ ~I (~1 I~ ~_) (v)C) (~

@ @. @) @ @ @ l~ @ @) *~~

H w--£ II WCATHER STATION AMBIENT TEMPERATURE G 7. F UPPER VENT TEMPERATURE IN °F CASK I

-~

B c

0 AVE VSC-1

!~A Rb 11~

J 1ri I! J0.75 VSC-2 10 7 99 ) J" 11q

/Ob. lJ VSC-3 VSC-4 VSC-5 VSC-6 YSC-7 YSC-8 VSC-9 VSC-10 VSC-11 VSC-12 VSC-13 VSC-14 VSC-15 YSC-16 VSC-17 VSC-18 VSC-19 VSC-20 YSC-Zl vsc-zz YSC-23 YSC-24 VSC-25 CCM4ENTS: -------------------------

PERFORMED BY: --~Z:t::~!.-4~---=:----

DATE:

CALCULATIONS VERIFIED DATE:

APPENDIX B SAMPLE CERTIFICATE OF CALIBRATION 32

.~

  • . *1
  • e CONSUMERS POWER COMP~

CERTIFICATE OF CALIBRATION Due Date: 10-25-94 M&TE ID Number: 001249 Procedure No: IS-H-47 Serial Number. T99074 Rev: 2 Manufacturer OMEGA Checklist ID: G Model Number 868 Rev: 0 Equipment Type: TEMP IND As Found User PALISADES PLANT Final User: PALISADES PLANT Notification No:

Verbal/Memo To:--~~~~~--

As Found Date: ~25-93 By:~

(X] Acceptable

[ ] Unacceptable

[ ] Other Explain=-------------~--------------------------------------

Final Date: !00:-_lS 5_-93 By: ~/"11 (X] Acceptable I ] Other Explain=~--------------------------------------------------~

Remarks:

~

================================================================

Ambient Conditions 23 Deg C 40

%RH Standards Used:

ID Number Date Due Norn Tol ID Number Dat:~ Due Norn To!

3141-10376

.07-14-94

+/-0.01%

This instrument has been calibrated using standards traceable to the National Institute of Standards and Technology, or a nationally accepted measuring system. The standards used in the calibration meet at least a 4:1 accuracy ratio, except where noted, and are supported by a calibration system which meets NRC 10 CFR 50 Appendix B requirements.

Address Approved: :~~~ya Technical Services

/?'

Consumers Power Company Title.Y __ o"5<"o=:;~------------------

135 West Trail Street Jackson Mich.

49201 Date:

/IJ/2-,l'f.l

__...... ~,~....... ~,....... --------------~

r--------

CONSUMERS POWER COMPAra.

.IBRATION AND INSTRUMENT sl'rvICES CALIBRATION REPORT v

ocedure: IS-H-47 ID number 001249
hecklist
G Rev.: 0 Serial number T99074 Interval 12MO Manufacturer OMEGA Q-Code Y2 Model number 868 PAGE 01 OF 01 Usage GEN Equipment type: TEMP IND
=================================================================

Limitations/Remarks: Indicator calibrated only. No probes.

Indicator calibrated for usage with 0.00385 coefficient PRT sensors.

=================================================================

Calibration point 200 *F Range

-199 to -100 *F

-100.1 to 199.9 *F

-100.0 *F

00. 0
  • F 100.0 *F 195.0 *F 1100 *F Range

-360 to 1100 *F

-360 *F 1100 *F Reading taken from:

M&TE As Found Final Date 10 -;i.5--93 Date / o-,7S*'73 Tech /321i(

Tech Z3 ;(?11

-100.0

-00.1 99.9 194.9

-361.0 1100.0

.. final Readings" same as Manufacturer

+/- Tolerance/Accuracies

1. 0 "F
0. 4 *F
1. 0 °F
0. 4
  • F
0. 4
  • F
0. 4 *F
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