ML070110290

Calculation, Alternative Source Term, H21C094, U1 MSLB, AST Methodology

ML070110290
Person / Time
Site:	Nine Mile Point
Issue date:	12/13/2006
From:	Pustulka H Nine Mile Point
To:	Office of Nuclear Reactor Regulation
References
H21C094
Download: ML070110290 (20)

Text

Nine Mile Point Unit 1 Alternative Source Term Calculation H21C094 "U1 MSLB, AST Methodology"

EngineeringPage 1 (Nextt2 Engieervins CALCULATIOWNCOVER SHEET '. Last Attachment2 Services Project: NINE MILE POINT NUCLEAR STATION Unit (1,2 or O=Both): 1 Discipline: CR Title Calculation No. H2 I C094 Ul MSLB, AST Mvethodology (Sub)system(s) Building Floor Elev. Index No.

N/A N/A N/A N/A Originator(s) H. Pustulka Reviewer(s)/Approver(s) M. Berg NMP Acceptance: p'.,

Eval., CR, or Rev Description Change No. Prepared By Date Reviewed by Date App Date 00 I-nitial Issue Z1 ' 1/12J1206 X c C. 2/13/06 12/13/06 Computer Output/Microfilm separately filed? (Yes/No/N/A) No- Safety Class: (*SR/NSR/Qxx): SR IfSR, attach or reference the associated Design Verification Report.

Superseded Document(s): -U.

Document Cross Reference(s) - For additional references see page(s) 5 Output provided? Ifyes, group(s)  !-ý W.

(Y/N)

Ref Ref No. Document No. ype Index Sheet Rev No. Document No. Type Index Sheet Rev General

References:

Remarks-Confirmation Required (Yes/No): M*, Final Issue Status Turnover See Page(s): IAP Req'd (Yes/N/A): VeS 10 CFR50.59 Evaluation Number(s): Component ID(s)(As shown inMEL): 0)/k Copy of Applicability Determination or 50.59 Screen Attached? YesEU No*E NIA X *lf"No", location of AD/Screen?

Key Words: Main Steam Line Break, MSLB, Design Basis, Dose, Accident

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page 2-(Next 3)

Project: Nine Mile Point Nuclear Station Unit: 1 Disposition: oI1L Originator/Date Reviewer/Date -Calculation No. Revision H.Pustulka 12/12/06 M.Berg 12/13/06 H21C094 0 Ket.

List of Effective Pages Page Latest Page Latest Page Latest Page Latest Page Latest Page Latest No. Rev. No. Rev. No. Rev. No. Rev. No. Rev. No. Rev.

1 0 Al-A5 0 2 0 Attach 1 0 3 0 Attach 2 0 4 0 5 0 6 0 7 0 8 0 9 0 11 0 12 0 Total Number of Calculation Pages 19

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page (Next 4 )

Project. Nine Mile Point Nuclear Station Unit: 1 Disposition: o4A Originator/Date Reviewer/Date Calculation No. Revision H,Pustulka 12/12/06 M.Berg 12/13/06 H21C094 0 Ref.

Table of Contents CALCULATIO NCOVER SHEET .................................... " ......................... ........................................... 1 List of Eff ectiv e Pages ................................................................................................................................... 2 Table of Conte nts .......................................................................................................................................... 3 Purp ose ......................................................................................................................................................... 4 Summary of Re sults ...................................................................................................................................... 4 Me th odology.................................................................................................................................................. 4 Assumptio ns .................................................................................................................................................. 5 Refe re nce s .................................................................................................................................................... 5 De s ign Inputs ................................................................................................................................................ 6 Calc ula tio n..................................................................................................................................................... 8 Conclu sions ................................................................................................................................................. 12 Appendix A: ASpreadsheet for the Calculation of Offsite and Control Room Doses (5 pages)

Attachment 1: Design Verification Report (1Page)

Attachment 2: Design Verification Checklist (1Page)

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page 4 (Next )

Project: Nine Mile Point Nuclear Station Unit: 1 Disposition:

Originator/Date Reviewer/Date Calculation No. Revision HjPustulka 12/12/06 M.Berg 12/13/06 H21C094 0 Purpose This calculation analyzes the Main Steam Line Break (MSLB) Accident for Nine Mile Point for both offsite and Control Room doses.

Summary of Results Table 1 - MSLB Summary of Dose Results 4 ýtCi/gm 1131 DE TEDE (rem)

Control Room 1.76E+00 EAB 5.29E-01 LPZ 4.53E-02 The offsite cases meet all of the applicable TEDE limits (2.5 rem EAB/LPZ at the normal coolant activity of 0.2 jtCi/grn DE 1131 per the Proposed Technical Specification [Ref. 4, Item 1.9] and 25 rem EAB/LPZ at the pre-incident spike coolant activity of 4.0 ýtCi/grn, or iodine spiking factor of 20*0.2 ýtCi/gmr [Ref 4., Item 1.10]). The Control Room meets the TEDE limit (5 rem for either coolant activity) for the normal proposed Tech Spec coolant activity.

This dose analysis fully complies with NRC Regulatory Guide 1.183 [Ref 1].

Methodology The MSLB accident is initiated from hot stand-by conditions in order to conservatively maximize the mass of coolant released from the break and thus maximizing the activity released. Following accident initiation, the radionuclide inventory from the released coolant is assumed to reach the environment instantaneously.

The TEDE values obtained for these analyses are compared with the 2.5/25 rem for offsite doses and the 5 rem TEDE limit for the Control Room [Ref I]. The 2.5 rem offsite value is for the 0.2 uCi/g 1-131 limit and the 25 rem value corresponds to the 4 uCi/g 1-131 limit caused by an iodine spiking factor of 20.

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page -5 (Next 6 -)

Project: Nine Mile Point Nuclear Station Unit: 1 Disposition:

Odginator/Date Reviewer/Date Calculation No. Revision

.HPustulka 12/12/06 M.Berg 12/13/06 H21C094 0 Ref.

Assumptions Assumption 1: There is no holdup in the Reactor Building.

Justification: Per Reference 1, there should be no holdup credited.

Assumption 2: In the calculation of the activity release, the entire released coolant mass is conservatively used as per Reference 1 (rather than just the liquid mass).

Justification: Reference 4 Assumption 3: There is no fuel damage. Therefore, there is no impact of Extendent Power Uprate or AST on the dose analysis other than the use of TEDE as the dose measure Justification: Reference 4. Since there is no fuel damage, AST has no impact on the activity released. Extended Power Uprate has no impact because the analysis is conducted at zero power hot standby.

Assumption 4: An infinite exchange rate between the Control Room and the environment is assumed.

Justification: Conservative References

1. "Alternative Radiological Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors", US NRC Regulatory Guide 1.183, Revision 0, July 2000

2. J.V. Ramsdell Jr., et al., "Atmospheric Relative Concentrations in Building Wakes",

NUREG/CR-6331 Revisionl (PNNL-10521 Revision 1), May 1997

3. "Atmospheric Relative Concentrations for Control Room Radiological Habitability Assessments at Nuclear Power Plants", US NRC Regulatory Guide 1.194, Revision 0 June 2003

4. PSAT 4026CF.QA.03, "Design Database For the Application of the Revised DBA Source Term to Nine Mile Point", Revision 0

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page_ 6 (Next 7_)

Project. Nine Mile Point Nuclear Station Unit: 1 Disposition:

Originator/Date Reviewer/Date Calculation No. Revision H.Puistlka !2/!2/06 I M.Berg 12/13/06 H21C094 0 R-ef.

Design Inputs Design Input Data (Reference 4, Item numbers given in brackets)

Control Room Free Volume: 1.35E+05 ft3 [3.9]

X/Q values in sec/m 3 *:

EAB: 1.90E-04 (ground-level) [5.1]

LPZ: 1.63E-05 (ground level) [5.2]

CR 9.98E-04 (ground-level) [5.3]

• This analysis qualifies as a puff release as per defined in Reference 3 [ie release lasts less then 1 minute], so the use of ground level and puff X/Q's are justified.

Breathing Rate in m3/s (from start of release for CR): 3.5E-4 [5.4]

Total mass of coolant: 1.0715E+05 ibm [1.8]

Reactor Steam: 24.5% of total mass of coolant [1.8]

Coolant DE-I-131 Activity per Unit Mass (microCurie/gram): 0.2 ýtCi/gm [1.9]

Spiking Multiplier for Coolant DE 1-131 Activity: 20 [1.10]

1131 DCF: 3.29E+04 Rem/Ci [9.2]

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page 7 (Next 8 -)

Project: Nine Mile Point Nuclear Station Unit: 1 Disposition: Rvso Originator/Date Reviewer/Date Calculation No. Revision H.Pustulka 12/12/06 M.Berg 12/13/06 H21C094 n Ref.I Activity Releases: Items [1.11 & 1.121 REACTOR COOLANT AND MAIN STEAM RADIONLUCLIDE CONCENTRATIONS (ui / g9m)

(A] [BJ T 1C0 ISOTOPE REACTOR MAIN COOLANT STEAM KR-83M 9.tE-04 KR-85M NOBLE 1,6E-03 KR-85 5.OE-06 KR-87 GASES 5.5E-03 KR-88 5.5E-03 KR-89 EXIST 3.4E-02 KR-90 7.5E-02 KR-91 ONLY IN 9.1E-02 KR-92 9.1E-02 REACTOR COOLANT AND MAIN STEAM KR-93 VAPOR 2.4E-02 RADIONUCLIDE CONCENTRATIONS KR-94 5.9E-03 (uCi [gi )

KR-95 STATE, 5.5E-04 [A] [1] [C]

KR-97 3.6E-06 ISOTOPE REACTOR MAIN COOLANT STEAM XE-131M 3.9E-06 XE-133M SO, THERE 7.5E-05 BR-F 3 1.6E-03 2.5E-05 BR-84 2.2E-03 3.1E-05 XE-133 2,1 E- 03 SR-85 9.9E-04 1.7E-05, XE-135M ARE NO 7.OE-03 1-131 8.6E-04 1.4E-051 XE-135 6.OE-03 1-132 1.6E-02 2.4E-04t XE-137 NOBLE GAS 3.qE-02 1-133 1.2E-02 1.9E-041 XE- 138 2.3E-02 1-134 2,9E-02 5.82E-04 XE-139 COOLANT 7.5E-02 1-135 1.2E-02 2.OE-04 XE- 140 &OE-02 ! RB-89 1.6E-03 1.6E-068 XE-141 CONCEN- 6.5E-02 CS-134 5.6E-06 5.6E-091 XE-142 1,gE-02 CS-136 3.7E-06 3,7E-091 XE-143 TRATIONS. 32E-03 CS-137 1.5E-051 1,5E-08 XE- 144 j 1.5E-04 CS-138 31E-03 3.1E-061

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page 8_

(Next 9 -)

Project: Nine Mile Point Nuclear Station Unit: 1 T Disposition:

Originator/Date Reviewer/Date Calculation No. Revision H.Pustulka 12/12/06 M.Berg 12/13/06 1H21C094 0 Ref.

Calculation Offsite and control room doses were calculated using the spreadsheet methodology outlined in Appendix A.

Calculation of the Source (Colunm 1 of ADDendix A snreadsheet)

The reactor coolant at the equilibrium level was analyzed for 0.2 jtCi/gm 1-131 dose equivalent. The spike concentration of 20 is used as scaling factor in the spreadsheet to report doses as 4 j.Ci/gm 1-131 dose equivalent.

The 1-131 dose conversion factor is 3.29E+04 Rem/Ci [Ref 4]. Therefore, 0.2 [tCi/grn 1-131 equivalent is 0.2

• 3.29E+04 Rem/Ci = 6.58 mRem/gm. The expected iodine activity from Reference 4, Item 1.12 has to be adjusted to yield 6.58 mRem/gm. This adjustment is performed in the table below where the iodine activity (ýtCi/gm) that is equivalent to 0.2

.tCi/gmn is calculated:

Table 2: Calculated Dose E uivalents (Iodine)

(0.2 10Ci/

gm 1131 DE)

Nuclide Expected Converted Expected Adjusted uCi/gm Rem/Ci mRem/4Ci mRem/gm p.Ci/gm 1131 8.60E-04 3.29E+04 3.29E+01 2.83E-02 4.60E-02 1132 1.60E-02 3.81E+02 3.81E-01 6.10E-03 8.55E-01 1133 1.20E-02 5.85E+03 5.85E+00 7.02E-02 6.41 E-01 1134 2.90E-02 1.31 E+02 1.31 E-01 3.80E-03 1.55E+00 1135 1.20E-02 1.23E+03 1.23E+00 1.48E-02 6.41 E-01 Total 6.99E-02 1.23E-01 3.73E+00

[Ref 4, Item 1.12] [Ref 4, Item 9.21 C3/1000 C2*C4 C2"(6.58/1.23E-01)

The remaining isotope activities must are adjusted by the same factor (0.2 [tCi/gm case:

6.5786/0.123 1) as the iodine.

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page 9 (Next 10 Project. Nine Mile Point NuclearStation Unit: 1 Disposition: __

Ordginator/Date Reviewer/Date Calculation No. Revision H Pustulka 12/1 2/n1 M.Berg 12113106 H2!C094 0 Ref.I Table 3: Isotope 0.2 uCi/Im 1131 DE Expected Expected (0.2 uCi/am 1131 DE)

Reactor Main Reactor Main Weighted Coolant Steam Coolant Steam Average*

Isotope (u Ci/gm) (uCi/gm) (uCi/gm) (uCi/gm) (uCi/gm) 1131 8.60E-04 1.40E-05 4.60E-02 7.49E-04 3.49E-02 1132 1.60E-02 2.40E-04 8.56E-01 1.28E-02 6.49E-01 1133 1.20E-02 1.90E-04 6.42E-01 1.02E-02 4.87E-01 1134 2.90E-02 5.80E-04 1.55E+00 3.10E-02 1.18E+00 1135 1.20E-02 2.OOE-04 6.42E-01 1.07E-02 4.87E-01 Cs134 5.60E-06 5.60E-09 3.OOE-04 3.OOE-07 2.26E-04 Cs136 3.70E-06 3.70E-09 1.98E-04 1.98E-07 1.49E-04 Cs137 1.50E-05 1.50E-08 8.02E-04 8.02E-07 6.06E-04 Cs138 3.10E-03 3.1OE-06 1.66E-01 1.66E-04 1.25E-01 Kr83m O.OOE+O0 9.10E-04 O.OOE+O0 4.87E-02 1.19E-02 Kr85m O.OOE+O0 1.60E-03 O.OOE+O0 8.56E-02 2.10E-02 Kr85 O.OOE+O0 5.OOE-06 O.OOE+O0 2.67E-04 6.55E-05 Kr87 O.OOE+O0 5.50E-03 O.OOE+O0 2.94E-01 7.21E-02 Kr88 O.OOE+O0 5.50E-03 O.OOE+00 2.94E-01 7.21 E-02 Xe131m O.OOE+O0 3.90E-06 O.OOE+O0 2.09E-04 5.11E-05 Xe133m O.OOE+O0 7.50E-05 O.OOE+O0 4.01E-03 9.83E-04 Xe133 O.OOE+O0 2.10E-03 O.OOE+O0 1.12E-01 2.75E-02 Xe135m O.OOE+O0 7.OOE-03 O.OOE+O0 3.74E-01 9.17E-02 Xe135 O.OOE+O0 6.OOE-03 O.OOE+O0 3.21 E-01 7.86E-02 X138 O.OOE+O0 2.30E-02 O.OOE+O0 1.23E+00 3.01E-01

• Weighted average values were calculated using the following:

[(1-0.245)*( uCi/gm)Reactor Coolant] + [(0.245)*( uCi/gm)Main Steam]

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page 10 (Next 11 )

Project: Nine Mile Point Nuclear Station Unit: Disposition:

Originator/Date Reviewer/Date Calculation No. Revision H.Pustulka 12/12/06 M.Berg 12/13/06 H21C094 0 Table 4 is the MSLB specific spreadsheet using the methodology in Appendix A to determine doses at the offsite and control room locations. The spreadsheet inputs are described below.

Scaling Factors (Rows 4, 5 & 6):

Scaling Factor I is the mass of coolant in grams, used to convert the core inventory concentration to total activity. Scaling Factor 2 is the multiplier on the coolant DE 1131 activity, (It should be noted that using a multiplying factor of 20, the dose results are for 4 ýtCi/gm 1131 DE), and Scaling Factor 3 is the conversion between Ci and uCi.

DF (Row 7)

The DF's are set to unity for this analysis.

Source in Ci/MW(t) (column 2):

The weighted average ýtCi/gm values from Table 3 were used.

The negligible amounts of Rb86, Kr89, Organic Iodine, and Xe137 were set to zero in this table.

Nuclide Specific Scaling Factor (column 3):

The Nuclide Specific Scaling Factor for noble gases in this calculation are set to 0.05. This value compensates for the short term spiking multiplier of 20 [Ref 4., Item 1.10], (scaling factor 2) which noble gas is not subject to. All other nuclide specific scaling factors are set to unity.

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page-N12 (Next 12 Project: Nine Mile Point Nuclear Station Unit: Disposition: __

Originator/Date Reviewer/Date Calculation No. Revision H.Pustulka 12/12/06 M.Berg 12/13/06 H21C094 0 Kef.

Table 4: MSLB Dose Calculation NMPI MSLB EAB LPZ CR Dispersion (X/Qs) 1.90E-04 1.63E-05 9.98E-04 sec/m3 CR Vol = 135000 ft3 w/ finite volume gamma correction 0.046212 Scaling Factor 1 = 4.86E+07 Mass of Coolant in Grams Scaling Factor 2 = 20 Multiplier on Activity Scaling Factor 3 = 1.OOE-06 Ci/uCi DF for Elemental I I DF for Alkali Metals I Nuclide- WB CEDE TEDE CR EAB LPZ CR Source: Specific DCF DCF DCF DCF TEDE TEDE TEDE Units >> uCi/g Scaling rem-m3 rem/Ci rem-m3 rem-m3 rem rem rem Nuclide Factor Ci-sec Ci-sec Ci-sec Kr83m 0.0119269 0.05 5.55E-06 0 5.55E-06 2.56E-07 6.1IE-10 5.24E-11 1.48E-10 Kr85m 0.0209704 0.05 0.0277 0 0.0277 0.00128 5.36E-06 4.60E-07 1.30E-06 Kr85 6.553E-05 0.05 0.00044 0 0.00044 2.03E-05 2.66E-10 2.28E-11 6.46E- 11 Kr87 0.0720858 0.05 0.152 0 0.152 0.007024 1.01E-04 8.68E-06 2.45E-05 Kr88 0.0720858 0.05 0.501 8.36E+01 0.53026 0.052412 3.53E-04 3.03E-05 1.83E-04 Kr89 0 0.05 0.323 0 0.323 0.014926 0.OOE+00 0.OOE+00 0.OOE+00 Xel3lm 5.112E-05 0.05 0.00144 0 0.00144 6.65E-05 6.79E-10 5.83E-l1 1.65E-10 Xe133m 0.000983 0.05 0.00507 0 0.00507 0.000234 4.60E-08 3.95E-09 1.12E-08 Xe133 0.0275237 0.05 0.00577 0 0.00577 0.000267 1.47E-06 1.26E-07 3.56E-07 Xel35m 0.0917455 0.05 0.0755 0 0.0755 0.003489 6.39E-05 5.48E-06 1.55E-05 Xe135 0.078639 0.05 0.044 0 0.044 0.002033 3.19E-05 2.74E-06 7.75E-06 Xe137 0 0.05 0.0303 0 0.0303 0.0014 0.OOE+00 0.OOE+00 0.OOE+00 Xe138 0.3014496 0.05 0.213 0 0.213 0.009843 5.93E-04 5.08E-05 1.44E-04 II3lOrg 0 1 0.0673 3.29E+04 11.5823 11.51811 0.OOE+00 0.OOE+00 0.OOE+00 11320rg 0 1 0.414 3.81E+02 0.54735 0.152482 0.OOE+00 0.OOE+00 0.OOE+00 11330rg 0 1 0.109 5.85E+03 2.1565 2.052537 0.OOE+00 0.OOE+00 0.OOE+00 11340rg 0 1 0.481 1.31EE+02 5.27E-01 0.068078 0.OOE+00 0.OOE+00 0.OOE+00 I135Org 0 1 0.307 1.23E+03 0.7375 0.444687 0.OOE+00 O.OOE+00 0.OOE+00 I13lElem 0.0348826 1 0.0673 3.29E+04 11.5823 11.51811 7.46E-02 6.40E-03 3.90E-01 l132Elem 0.6487112 1 0.414 3.81E+02 0.54735 0.152482 6.55E-02 5.62E-03 9.59E-02 l133Elem 0.4866643 1 0.109 5.85E+03 2.1565 2.052537 1.94E-01 1.66E-02 9.68E-01 I134Elem 1.1776874 1 0.481 1.31E+02 0.52685 0.068078 1.15E-01 9.83E-03 7.77E-02 I135Elem 0.4867953 1 0.307 1.23E+03 7.38E-01 0.444687 6.63E-02 5.69E-03 2.1OE-01 Rb86 0 1 0.0178 6.62E+03 2.3348 2.317823 0.OOE+00 0.OOE+00 0.OOE+00 Cs134 0.000226 1 0.28 4.63E+04 16.485 16.21794 6.88E-04 5.90E-05 3.55E-03 Cs136 0.0001493 1 0.392 7.33E+03 2.9575 2.583615 8.15E-05 6.99E-06 3.74E-04 Cs137 0.0006054 1 0.101 3.19E+04 11.266 11.16967 1.26E-03 1.08E-04 6.56E-03 Cs138 0.1251196 1 0,4255 1.15E+02 0.465904 0.060067 1.08E-02 9.23E-04 7.29E-03 Total TEDE = 5.29E-01 4.53E-02 1.76E+00

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page 12 (Next _Al__

Project:Nine Mile Point Nuclear Station Unit: 1 Disposition:

Originator/Date Reviewer/Date CalculationNo. Revision

[H. Pustulka 12!12/06 M.Berg 12/13/06 H21C094 0

• e-f.

Conclusions The TEDE doses resulting from a design basis Main Steam Line Break (MSLB) at Nine Mile Point Unit 1 analyzed using the alternative source term assumptions as given in Regulatory Guide 1.183 [Ref 1] are found to be well below the accepted limit.

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page Al (Next A2-)

Project: Nine Mile Point Nuclear Station Unit: 1 Disposition:

Originator/Date Reviewer/Date Calculation No. Revision

,,H.Pustulka 12/12/06 M.Berg 12/13/06 H21 C094 0 Ref.

Appendix A A Spreadsheet for the Calculation of Offsite and Control Room Doses Background/Methodology It is desirable for simplicity in many cases to calculate a bounding radiation dose for a given accident using several basic assumptions. These are as follows:

o It is assumed that the release of activity may be defined at the outset (i.e., there are no time-dependent mechanisms that modify the amount of activity that's released; e.g., no delayed filtration or holdup).

o It is assumed that the release is instantaneous and complete, and the transport to the receptor is instantaneous, as well. Therefore, no radioactive decay needs to be considered. Note that the activity release, A, may, in fact, occur over a given time duration, t, at a rate A/t. As long as the exposure time is equal to duration of the release, time cancels out of the integrated dose analysis.

o It is assumed that the release is limited to coolant and/or gap activity (i.e., only a limited number of radionuclides are included in the sheet).

o It is assumed that the chemical/physical form of the iodine as it is released is limited to organic and elemental.

o No credit for control room emergency ventilation (i.e., filtration) is assumed.

o It is assumed that the atmospheric dispersion for the duration of the release may be characterized by a single value of X/Q for each location (EAB, LPZ, and control room).

o It is assumed that the exchange rate of the control room with the environment is infinite so that the concentration of activity inside the control room is equal to that in the atmosphere.

o It is assumed that the breathing rate of exposed individuals is a constant 3.5E-4 m 3/sec.

Effectively, this means the release actually must occur over a period of no more than eight hours in order for the LPZ dose not to be overstated.

o It is assumed that the control room occupancy factor is unity.

In addition, for the spreadsheet to be consistent with Reference 1, Dose Conversion Factors (DCFs) based on References 2 and 3 must be used. These are taken from the default TID.INP and FGR60.INP default files of Reference 4. Breathing rates and occupancy factors are taken from Reference 1.

The following section describes the development of such an Excel spreadsheet.

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page A2 (Next __A3_)

Project. Nine Mile Point Nuclear Station Unit: 1 Disposition:

Originator/Date Reviewer/Date Calculation No. Revision H. 1,,2tulk,

/1221060 M. rg 12/13/06 H21 C094 0 Ref.

Spreadsheet Development The spreadsheet is displayed at the end of this section, just before the references.

At the top of the spreadsheet (in the first row) is the title. An example might be "NMPI MSLB". In the second row may be found the EAB, LPZ, and control room X/Qs in units of seconds/m3 . The control room volume in ft3 is given in the third column. It is included to provide the basis for the finite volume correction factor for gamma shine dose provided by Reference 1 (calculated to the right of the control room volume).

The next three rows provide scaling factors that apply equally to all of the radionuclides listed and to all of the calculated doses (EAB, LPZ, and control room). For example, in an FHA analysis, if the core-wide activity available for release is expressed as Ci/MWt, one scaling factor may be the power of the core, a second may be the peaking factor to account for the fact that the specific activity in the affected fuel bundles may be greater than the core average, and the third may be the fraction of the core's activity that is released from the damaged bundles (i.e., the fraction of the core activity assumed to be in the gap multiplied by the fraction of the core fuel bundles that are damaged by the drop). Space is available next to each scaling factor to annotate what each value represents.

DFs are specifically provided in the next row after the scaling factors. One DF is provided for elemental iodine and one for alkali metals (i.e., Cs and Rb).

The "Source" column (i.e., the second column) has already been mentioned. One space is provided under "Source" to identify the units of "Source". For each of the coolant and/or gap release radionuclides identified in the first column, a "Source" entry may be made.

In the third column, there is a place for scaling factors unique to individual radionuclides. For example, gap fractions that differ from the general gap fraction may be accommodated using these radionuclide-specific scaling factors. If the 1-131 gap fraction is 8% vs. the general value of 5%, then the "Source" for 1-131 would have to be increased by a factor of 1.6 to account for that difference.

That factor may be entered in the third column.

In the fourth column, the DCFs for immersion dose are provided. As noted previously, these are taken from Reference 4 TID.INP and FGR60.INP with the multiplication of "Cloudshine-Effective" by 3.7E12 to convert Sv-m 3/Bq-sec to rem-m 3/Ci-sec. In the fifth column, the "Inhaled-Chronic-Effective" values from FGR60.INP have been multiplied by the same 3.7E12 to convert Sv/Bq to rem/Ci. Note that these DCFs include short-lived decay daughters as long as (1) the daughter has a half-life less than 90 minutes and (2) the daughter has a half-life less than 0.1 times the parent. One exception has been made to this rule. Because of its importance as a decay daughter, the DCFs for Rb-88 have been added to those for Kr-88 even though the half-life of Rb-88 (17.8 minutes) is slightly greater than 10% of its parent Kr-88 (170.4 minutes).

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page A3 (Next A4-)

Project: Nine Mile Point Nuclear Station Unit: 1 Disposition:

Originator/Date Reviewer/Date Calculation No. Revision H. Pustulka 12/12/06 M.Be.rg 12)/13/n06 H910094 In the sixth column, a TEDE DCF is prepared which is the sum of the immersion DCF and the inhalation DCF times the assumed breathing rate of 3.5E-4 m3/sec.

In the seventh column, a control room DCF is defined which is similar to the TEDE DCF. However, the immersion DSF is diminished by the finite volume correction factor defined as the following in Reference 1:

DDEC..V 338 V.3 DDEf,qn,~ -

1173 For a control room volume of 135,000 ft3, for example, the factor is 0.0462. Note that this factor appears next to the control room volume at the top of the spreadsheet. It is -unity for a control room volume of 1.2E9 ft3 .

The eighth column is the EAB dose, the product of Columns 2, 3, and 6, the three general scaling factors, and the EAB X/Q. Note that if a release of the activity, A, in Column 2 occurs over time, t, the release rate is A/t assuming a unit scaling factor in Column 3. When multiplied by the X/Q, the product is the concentration present at the X/Q location for the time, t (i.e., for the duration of the release). When multiplied by the DCF (Column 6) in units of rem-volume/Ci-time, the result is a dose rate for the duration, t. As long as it is assumed that the exposure duration, t', is the same as release duration, t, then the immersion + inhalation dose is simply the product as just described. In the last row of Column 8, the EAB dose is summed for all radionuclides in Column 1. Note that in calculating the EAB dose, the elemental iodine dose is reduced by the DF for elemental iodine and the alkali metal dose is reduced by the DF for alkali metals.

In Column 9, the Column 8 results are adjusted by the ratio of the LPZ X/Q to the EAB X/Q to obtain the LPZ dose.

Finally, in Column 10, the Column 8 results are adjusted by the ratio of the control room X/Q to the EAB X/Q and by the ratio of the control room DCF to the TEDE DCF to obtain the control room dose contribution for each radionuclide. As with the EAB and the LPZ doses, these are summed at the bottom of column to obtain the total control room TEDE.

-. 1

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page A4 (Next __Aý5__

Project. Nine Mile Point NuclearStation Unit: 1 Disposition:

Originator/Date Reviewer/Date Calculation No. Revision H. Pustulka 12/12/06 M.Berg 12/13/06 H21C094 0 R*ef.

Spreadsheet for Simplified Dose Evaluation TITLE EAB LPZ CR Dispersion (X/Qs) x.xxE-xx x.xxE-xx x.xxE-xx sec/m3 CR Vol = 1.20E+09 ft3 w/ finite volume gamma correction 0.999 Scaling Factor 1 = 1 Scaling Factor 2 = 1 Scaling Factor 3 = 1 DF for Elemental I = 1 DF for Alkali Metals = 1 Nuclide- WB CEDE TEDE CR EAB LPZ CR Source: Specific DCF DCF DCF DCF TEDE TEDE TEDE Units >> Scaling rem-m3 rern/Ci rem-m3 rem-m3 rem rem rem Nuclide Factor Ci-sec Ci-sec Ci-sec Kr83m 0 1 5.55E-06 0 5.55E-06 5.54E-06 0.OOE+00 0.OOE+00 0.OOE+00 Kr85m 0 1 0.0277 0 0.0277 0.027666 0.OOE+00 0.OOE+00 0.OOE+00 Kr85 0 1 0.00044 0 0.00044 0.000439 0.OOE+00 0.OOE+00 0.OOE+00 Kr87 0 1 0.152 0 0.152 0.151813 0.OOE+00 0.OOE+00 0.OOE+00 Kr88 0 1 0.501 8.36E+01 0.53026 0.529643 0.OOE+00 0.OOE+00 0.OOE+00 Kr89 0 1 0.323 0 0.323 0.322603 0.OOE+00 0.OOE+00 0.OOE+00 Xel3lm 0 1 0.00144 0 0.00144 0.001438 0.OOE+00 0.OOE+00 0.OOE+00 Xe133m 0 1 0.00507 0 0.00507 0.005064 0.OOE+00 0.OOE+00 0.OOE+00 Xe133 0 1 0.00577 0 0.00577 0.005763 0.OOE+00 0.OOE+00 0.OOE+00 Xel35m 0 1 0.0755 0 0.0755 0.075407 0.OOE+00 0.OOE+00 0.OOE+00 Xe135 0 1 0.044 0 0.044 0.043946 0.OOE+00 0.OOE+00 0.OOE+00 Xe137 0 1 0.0303 0 0.0303 0.030263 0.OOE+00 0.OOE+00 0.OOE+00 Xe138 0 1 0.213 0 0.213 0.212738 0.OOE+00 0.OOE+00 0.OOE+00 I131Org 0 1 0.0673 3.29E+04 11.5823 11.58222 0.OOE+00 0.OOE+00 0.OOE+00 11320rg 0 1 0.414 3.81E+02 0.54735 0.546841 0.OOE+00 0.OOE+00 0.OOE+00 11330rg 0 1 0.109 5.85E+03 2.1565 2.156366 0.OOE+00 0.OOE+00 0.OOE+00 11340rg 0 1 0.481 1.31E+02 5.27E-01 0.526258 0.OOE+00 0.OOE+00 0.OOE+00 11350rg 0 1 0.307 1.23E+03 0.7375 0.737122 0.OOE+00 0.OOE+00 0.OOE+00 I131Elem 0 1 0.0673 3.29E+04 11.5823 11.58222 0.OOE+00 0.OOE+00 0.OOE+00 I132Elem 0 1 0.414 3.81E+02 0.54735 0.546841 0.OOE+00 0.OOE+00 0.OOE+00 I133Elem 0 1 0.109 5.85E+03 2.1565 2.156366 0.OOE+00 0.OOE+00 0.OOE+00 I134Elem 0 1 0.481 1.31E+02 0.52685 0.526258 O.OOE+00 0.OOE+00 O.OOE+00 I135Elem 0 1 0.307 1.23E+03 7.38E-01 0.737122 0.OOE+00 0.OOE+00 0.00E+00 Rb86 0 1 0.0178 6.62E+03 2.3348 2.334778 0.OOE+00 0.OOE+00 0.OOE+00 Cs134 0 1 0.28 4.63E+04 16.485 16.48466 0.OOE+00 0.OOE+00 0.OOE+00 Cs136 0 1 0.392 7.33E+03 2.9575 2.957018 0.OOE+00 0.OOE+00 0.OOE+00 Cs137 0 1 0.101 3.19E+04 11.266 11.26588 0.OOE+00 0.00E+00 0.OOE+00 Cs138 0 1 0.4255 1.15E+02 0.465904 0.46538 0.OOE+00 0.OOE+00 0.OOE+00 Total TEDE O.OOE+00 O.OOE+00 O.OOE+00

ENGINEERING SERVICES CALCULATION CONTINUATION SHEET Page .A5 (Next: Attachment 1) 1 Project. Nine Mile Point Nuclear Station Unit: 1 Disposition: __

Originator/Date Reviewer/Date Calculation No. Revision H,Pustulka 12/12/06 M.Berg 12/13/06 H210C94 0 Ref.

References A-I Regulatory Guide 1.183, "Alternative Radiological Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors", July 2000 A-2 K.F. Eckerman et al., "Limiting Values of Radionuclide Intake and Air Concentration and Dose Conversion Factors for Inhalation, Submersion, and Ingestion," Federal Guidance Report 11, EPA-520/1-88-020, Environmental Protection Agency, 1988.

A-3 K.F. Eckerman and J.C. Ryman, "External Exposure to Radionuclides in Air, Water, and Soil," Federal Guidance Report 12, EPA-402-R-93-081, Environmental Protection Agency, 1993 A-4 NUREG/CR-6604, "RADTRAD: A Simplified Model for RADionuclide Transport and Removal And Dose Estimation", December 1997

VI Document being design-verified: Q DCP I--Calc UI Spec U- NER U DBD L3 Other Doc#, Rev and

Title:

H21 C094, Revision 0 : UI MSLB, AST Methodology Extent of Design Verification (Briefly describe):

This calculation was design verified by 1) validating all input with respect to the input database (with the exception of the Dose Conversion Factors which were validated utilizing the FGR 11 and 12 parent documents), making sure that the appropriate input values were used; 2) assuring that all assumptions are conservative and conform to the Req.Guide 1.183 AST requirements; 3) validating the calculation methodology and calculation tools (i.e. spreadsheet) as being acceptable for the task; and 4) validating final results to make sure that they are as expected.

Method of Design Verification:

[91 Design Review 0I Qualification Testing UI Alternate Calculations LI Applicability of Proven Design Results of Design Verification:

[] Fully acceptable with no issues identified LI Fully acceptable based on the following issues identified and resolved:

All input were appropriate and all assumptions valid (no further validation of assumptions are required). The calculation methodologies were appropriate for the task. All calculated values conform to as expected results.

The calculation made several assumptions which simplified the analysis, and also added significant conservatism. Among these conservatisms is the control room being essentially open to the environment, so that no Habitability Zone protections were taken into account (such as filtration, delayed inflow, etc.). Minor issues were commented upon and corrected prior to final draft of the calculation, LI Continuation Page Follows Discipline Involvement and Approvals:

Lead Design M.Berg 12/13/06 Verifier:

Name Signature Date Discipline Design Verifiers, if required:

N/A Discipline t

Name Signature Date

V1/

i" aA-t rs.

The following questions are required to be addressed based on the Nine Mile Point commitment to NQA-1 (1983) for design verification activities. This checklist is intended to assist when using the Design Review method of design verification to ensure relevant items are addressed in the verification effort. Each "No" answer will require correction or resolution by the originator of the document being verified prior to full acceptance by the design verifier(s).

Doc #: H21C094 Lead Design Verifiers M.Berg Name:

Items Addressed with Basis of Review Answer Review Check Yes No N/A 1, Were the inputs correctly selected ?

x

2. Are assumptions necessary to perform the design activity adequately described and reasonable ? Where necessary, are the assumptions identified for subsequent re-verifications when the detailed activities are completed ?

3. Was an appropriate design method used?

x

4. Were the design inputs correctly incorporated into the design ?

x

5. Isthe design output reasonable compared to design inputs ?

x

6. Are the necessary design input and verification requirements for interfacing organizations specified in the design documents or insupporting procedures or instructions? X