ML20217M414
| ML20217M414 | |
| Person / Time | |
|---|---|
| Site: | Paducah Gaseous Diffusion Plant |
| Issue date: | 10/15/1999 |
| From: | UNITED STATES ENRICHMENT CORP. (USEC) |
| To: | |
| Shared Package | |
| ML20217M390 | List: |
| References | |
| NUDOCS 9910270215 | |
| Download: ML20217M414 (8) | |
Text
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4 GDP 99-0174 l
Page1of3 i
United States Enrichment Corporation (USEC)
Proposed Changes Certificate Amendment Request Updrite the Application Safety Analysis Report Detailed Description of Change 1.0 Purpose The purpose of this submittal is to provide revised pages to the Safety Analysis Report Update (SARUP) previously transmitted in USEC letters GDP 97-0188, dated October 31,1997 (Reference 1); GDP 98-0064, dated March 31,1998 (Reference 2); GDP 98-0219, dated October 19,1998 (Reference 3); GDP 98-0235, dated November 6,1998 (Reference 4); GDP 99-0102, dated July 1, 1999 (Reference 5); GDP 99-0117, dated July 16,1999 (Reference 6); GDP 99-0126, dated August 17,1999 (Reference 7); and GDP 99-0155, dated August 31,1999 (Reference 8) for NRC review and approval.
2.0 Reseription of Submittal and Basis for Channes The following changes are included in this submittal which modify the latest version of the SAR Update certificate amendment request. The revised pages are included in Enclosure 3.
A.
The Revision L-og has been updated to reflect the changes included in this revision.
B.
The List of Effective Pages has been updated to reflect the changes included in this revision.
C.
SARUP Section 4.3.2.2.14, Cylinder Failure Inside Autoclave, was revised to reflect the results of new analysis of autoclave head-to-shell 0-ring leakages.
3.0 Hasis for the Revision This change incorporates the results of a new analysis regarding autoclave head-to-shell 0-ring i
leakage assumed in SARUP section 4.3.2.2.14, Cylinder Failure Inside Autoclave. As part of the initial certificate amendment request to update the SAR (SARUP), USEC made a commitment to j
re-evaluate the calculated leakage through the autoclave head-to-shell 0-ring by more accurately defining the reaction process. New laboratory tests were performed to estimate the reaction rates and resulting temperatures and pressures that would be experienced due to a UF release into a closed autoclave. Analysis of these test results found that the SARUP autoclave models usM. to assess j
autoclave conditions during the proposed accident were overly conservative with respect to predicted temperatures and pressures. Based on these results, the UF release rate was calculated from a closed 6
autoclave following a 14-ton cylinder failure inside based on a hole in the autoclave seal of i
equivalent size to result in the TSR acceptable leakage rate. The release rates were determined for 9910270215 991015 PDR ADOCK 07007001 C
GDP 99-0174 Page 2 of 3 two difTerent cases: (1) for a hole in the autoclave seal toward the top of the autoclave (resulting in a UF vapor release); and (2) for a hole in the bottom of the autoclave seal (resulting in a liquid UF6 release). These results are different than that presented in SARUP section 4.3.2.2.14 source term discussions. Specifically, the previous single release rate of 3 lb/ min is being replaced by two release rate cases: 3.5 lb/ min (vapor release) and 8.3 lb/ min (liquid release). This change is revising the reported release rates discussed in section 4.3.2.2.14 of the SARUP. The basic conclusions from the scenario are not changed by this new analysis in that: (1) the release is still bounded; and (2) the release from the closed autoclave would be maintained below Evaluation Guidelines for this type of accident. The calculations used for this analysis are available onsite for review.
References 1.
Letter from James H. Miller (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report, USEC Letter GDP 97-0188, October 31,1997.
2.
Letter from George P. Rifakes (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes, USEC Letter GDP 98-0064, March 31,1998.
3.
Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes, USEC Letter GDP 98-0219, October 19,1998.
4.
Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes, USEC Letter GDP 98-0235, November 6,1998.
5.
Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes Associated with the Cascade and Balance of Plant Facilities, USEC Letter GDP 99-0102, July 1,1999.
6.
Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes Associated with the Feed, Toll Transfer, and Sampling Facilities, USEC Letter GDP 99-Ol l7, July 16,1999.
7.
Letter from Steven A. Toelle (USEC) to Dr. Carl 5. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes, USEC Letter GDP 99-0126, August 17,1999.
p ;.
l t
i GDP 99-0174 Page 3 of 3 8.
Letter from Steven A. Toelle.(USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Chnges, USEC Letter GDP 99-0155, August 31,1999.
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1 GDP 99-0174 l
5 Pages Total
- PROPOSED CHANGES.
. CERTIFICATE AMENDMENT REQUEST SAFETY ANALYSIS REPORT UPDATE '
INSERTION /REMOVALINSTRUCTIONS
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' OCTOBER 8,1999 REVISION Remove Pages Insert Pages SARUP Revision Log SARUP Revision Log lii iii SARUP List of Effective Pages SARUP List of Effective Pages SARUP-1, SARUP-10 SARUP-1, SARUP-10 SARUP Section 4.3 SARUP Section 4.3 4.3-114 4.3-114 i
t I
i
c October 8,1999 Safety Analysis Report Update REVISION LOG (continuation) 7/23/99 Submittal to incorporate the necessary changes for incorporation of the current USEC-01 TSRs and the associated changes to SARUP Section 3.15 and Chapter 4 for the cascade and balance of plant. The following sections are affected: Section 3.15 Table of Contents, 3.15.3.1.3,1 3.15.3.3.3, 3.15.3.4.1, 3.15.3.4.3, 3.15.3.6.3, 3.15.4.1, 3.15.4.1.1, 3.15.4.1.2, 3.15.4.1.3. 3.15.4.1.4, 3.15 A.I.5, 3.15.4.2, 3.15.4.2.1, 3.15.4.2.3, 3.15.4.7, 3.15.4.7.1, 3.15.4.7.2, 3.15.4.7.3, 3.15.4.7.4, 3.15.4.7.5, 3.15.4.8, 3.15.4.8.1, 3.15.4.8.2, 3.15.4.8.3, 3.15.4.8.4,.3.15.4.8.5, 3.15.6.5, 3.15.6.5.1, 3.15,6.5.2, 3.15.6.5.3, 3.15.7.3.1, 3.15.7.3.3, 3.15.7.3.4, 3.15.7.9.1, 3.15.7.9.2, 3.15.7.9.3, 3.15.10.4.8.1, 3.15.10.4.8.2, 3.15.10.4.8.3, 3.15.10.4.8.4, 3,15.10.4.9,
{
3.15.10.4.9.1, 3.15.10.4.9.4, 3.15.10.4.9.5, 3.15.10.4.10, 3.15.10.4.10.1, 3.15.10.4.10.4,3.15.10.4.10.5,. Table 3.15-1, Table 3.15-2, Table 3.15-3,4.1,4.2.5.3, 4.2.6.3.4, Table - 4.2-5, 4.3.2.2.1, 4.3.2.2.4, 4.3.2.2.11, 4.3.2.2.12, 4.3.2.2.16, 4.3.2.2.17, TSR Table of Contents, TSR 2.2.4.14 Basis, TSR 2.3.2.2 Basis, TSR 2.3.3.2 Basis, TSR 2.3.4.1 Limited Condition of Operation (LCO), Actions and Basis, TSR 2.3.4.2 Basis, TSR 2.3.4.3 Basis, TSR 2.3,4.4 Basis, TSR 2.3.4.5 Basis, TSR 2.3.4.6
)
Basis, TSR 2.3.4.7 Basis, TSR 2.3.4.8 Basis, TSR 2.3.4.9 Basis, TSR 2.3.4.10 Basis, TSR 2.3.4.11 Basis, TSR 2.3.4.12 Basis, TSP. 2.3.4.14 Basis, TSR 2.3.4.15 Basis, TSR 2.3.4.16 Basis, TSR 2.3.4.17 Basis, TSR 2.3.4.18 Basis, TSR 2.3.4.19 Basis, TSR 2.3.4.20 Basis, TSR 2.3.4.21 Basis, TSR 2.3.4.23 Basis, TSR 2.3.4.24 (all new), TSR 2.3.4.25 (all new), TSR 2.3.5.1 Basis, TSR 2.3.5.2 Basis, TSR 2.3.5.3 Basis, TSR I
2.3.5.4 Basis, TSR 2.3.5.5 Basis, TSR 2.3.5.6 Basis and TSR 2.3 Appendix A, TSR f
Section 3.0, Administrative Controls, Table 3.2.2.1.
8/31/99 Submittal to incorporate the necessary changes for incorporation of the current USEC-01 TSRs and the associated changes to SARUP Chapter 1, Appendix A, Section 2.1, Section j
3.15, Chapter 4, and Chapter 5. The following sections are affected: Chapter 1, Appendix l
A: 1.1,1.6, and 2.2; 2.1.3.1, Section 3.15 Table of Contents, 3.15.4.8.3, 3.15.6.2.1,-
3.15.6.2.2, 3.15.6.2.3, 3.15.6.2.4, 3.15.6.2.5, 3.15.7.1.3, 3.15.7.7, 3.15.10.4.4, 3.15.10.4.4.1, 3.15.10.4.4.2, 3.15.10.4.4.3, 3.15.10.4.4.4, 3.15.10.4.4.5, 3.15.10.4.5,'
3.15.10.4.6, Table 3.15-1, Table 3.15-2, Table 3.15-3, Table 3.15-10,4.2.6.2,4.2.6.5, 4.2.6.8.1, Table 4.2-7, Table 4.2-8, Table 4.2-9, Table 4.2-10, Table 4.2-11, 4.7.2.2.4, 4.3.2.2.15, 5.2, Appendix A: 1.7,2.4,3.4,5.6.2,5.6.13.3, TSR 2.1.5.2 Design Feature s
I 10/8/99 Submittal to incorporate changes to the analysis of the autoclave head-to-shell 0-ring leakage as required by Action 8 for Table 1 in the i 4 SARUP CAR dated October 31, j
1997. The following section is affected: 4.3.2.2.1-lii i
J
SARUP-PGDP October 8,1999 SARUP LIST OF EFFECTIVE PAGES SARUP P. ige RAC/Date/ Revision SARUP Pane RAC/Date/ Revision Revision Log I
July 23,1999 Chapter 2 ii July 23,1999 iii October 8,1999 3
97C100 SARUP List of Effective Panes 4
97C100 5
97C100 SARUP-1 October 8,1999 6
97C100 (RO)
SARUP-2 August 31,1999 97C255 (RO)
SARUP-3 August 31,1999 6a 97C100 SARUP-4 August 31,1999 SARUP-5 August 31,1999 2.1-1 97C100 SARUP-6 August 31,1999 2.1-3 97C100 (RO)
' S ARUP-7 August 31,1999 97C206 (RO)
SARUP August 31,1999 99C026 (RO)
SARUP-9 August 31,1999 2.1-4 97C100 SARUP-10 October 8,1999 2.1-5 97C100 SARUP-11 August 31,1999 2.1-20 97C100 SARUP-12 August 31,1999 SARUP-13 August 31,1999 2.2-1 97C100 SARUP-14 August 31,1999 2.2-2 97C100 Chapter 1. Apo. A 2.3-1 97C100 2.3-2 97C100 A-1 97C238 (R1) 2.3-3 97C100 97C207 (RO) 2.3-4 97C100 98Cl24 (RI) 2.3-5 97C100 99C005 (RO) 2.3-6 97C100 A-2 97C238 (R1) 2.3-7 97C100 98C106 (RO) 2.3-8 97C100 98C149 (RO) 2.3-9 97C100 99C027 (RO) 2.3-10 97C100
)
A-3 97C238 (RO) 2.3-10a 97C100 98Cl16 (RO) 2.3-10b 97C100 A-4 97C238 (RO) 2.3-11 97C100 98C116 (RO)
-2.3-11a 97C100 A-5 '
97C238 (RO) 2.3-1 Ib 97C100
]
98C149 (RO) 2.3-12 97C100 A-6 97C238 (RO) 2.3-13 97C100 A-7 Rev.8 2.3-14 97C100 A-8 97C238 (RO)
A-9 Rev.8 2.4-1 97C100 A-10 Rev.8 2.4-la 97C100 SARUP-1 i
l SARUP-PGDP October 8,1999 SARUP LIST OF EFFECTIVE PAGES
- SARUP Pagg RAC/Date/ Revision SARUP Pace RAC/Date/ Revision 4
4.3-107 97C124 4.3-131 97Cl24 (R1) 4.3-108 97C124 99C029 (RO) 99C029 (RO) 4.3-132 97C124 4.3-109 97C124 99C029 (RO) 99CO29 (RO) 4.3-132a 97C124 4.3-110 97C124 99C029 (RO) 99C030 (RO) 4.3-132b 97C124 99C029 (RO) 99C029 (RO) 4.3-111 97C124 4.3-133 97C124 i
99C030 (RO) 97C125 4.3-112 97Cl24 99C029 (RO) 4.3-113 97C124 4.3-134 97C125 99C030 (RO) 4.3-135 97C125 4.3-114 97Cl24 4.3-136 97Cl25 99C030 (RO) 4.3-137 97C125 99C058 (RO) 4.3-138 97Cl25 (RO) 4.3-115 97Cl24 98C068 (RI) 99C030 (RO) 4.3-139 97C125 (RO) 4.3-116 97Cl24 (RO) 98C068 (RI) 97C200 (RO) 4.3-140 97C125 98C073 (RO) 4.3-141 97C125 (RO) 4.3-117 97Cl24 (RO) 98C068 (Rl) 97C200 (RO) 4.3-142 97C125 (RO) 98C073 (RO) 98C068 (R1) 4.3-118 97C124 4.3-143 97C125 (RO) 4.3-119 97Cl24 98C068 (R1) 4.3-120 97Cl24 4.3-144 97C125 (RO) 4.3-121 97Cl24 98C068 (RI) 4.3-122 97C124 4.3-145 97C125 (RO) 4.3-123 97C124 98C068 (R1) 4.3-124 97C124 4.3-146 97Cl25 4.3-125 97C124 4.3-147 97C125 99C030 (RO) 97Cl26 98C073 (RO) 4.3-148 97C126 4.3-126 97C124 (R1) 4.3-149 97Cl26 97C200 (RO) 4.3-150 97Cl26 98C073 (RO) 4.3-151 97C126 4.3-127 97C124 (R1) 4.3-152 97C126 4.3-128 97Cl24 4.3-153 97C126 99C029 (RO) 4.3-154 97C126 4.3-129 97C124 4.3-155 97C126 99C029 (RO) 4.3-156 97C126 4.3-130 97C124 99C029 (RO)
SARUP-10
SAR-PGDP PROPOSED October 8,1999
. RAC 97Cl24,99C030 (RO),99C058 (RO)
During operations in which the autoclave is closed for heating purposes, the only autoclave penetration that would allow release of material to the atmosphere is the condensate drain line. Any releases through this line would react with the condensate to form UO F and HF. Both of these compounds 2 2 are sufficiently soluble in water to allow very little, if any, release to the atmosphere. Once isolation of the autoclave is accomplished (typically less than 35 seconds for any significant release), the inflow of steam will be terminated to prevent additional moisture from entering the autodave and reacting with the UF.,
The pressure inside the autoclave will continue to rise until the limiting reactant (i.e., the moisture) is consumed. An analysis (ref 4-4) indicates that the pressure inside the autoclave will not reach the maximum allowable working pressure (MAWP) for any of the autoclaves given any of the autoclave / cylinder configurations. Therefore, no release due to autoclave over pressurization is considered.
Subsequent leakage of released 11aterial from the autoclave as a result of leakage past valve seats and the autoclave shell seals is also considered. This leakage was quantified (ref. 4-4) by assuming that the autoclave is functionally tested at 90 psig (0.72 MPa) with no more than 10 psi /h (69 kPa)/h) or 12 scfm loss. Two cases were considered. The first case assumed that the leakage occurs at the autoclave shell seal toward the top of the autoclave, resulting in a UF vapor release. The release rate for this case was 6
determined to be 3.5 lb/ min (1.6 kg/ min). The second case assumed that the leakage occurs at the autoclave shell seal toward the bottom of the autoclave, resulting in a liquid UF. release. The release rate for this case was determined to be 8.3 lb/ min (3.8 kg/ min). These release rates are extremely low relative to the rates evaluated in Section 4.3.2.2.10, pigtail /line failure outside autoclave. Additional leakage through the autoclave seal may also be experienced if some degradation occurs due to the environment inside the autoclave. However, the leak rate would have to be significant to result in any significant consequences beyond the immediate vicinity. This is not expected because less than 200 lb (91 kg) of HF is generated from the reaction with UF. Therefore, the releases from a closed autoclave would be maintained below 6
the EGs for the EBE frequency category, c.
Conseauence Analysis This is not applicable because the amount of release is bounded by the event evaluated in Section 4.3.2.2.10.
d.
_Cmnparison With Guidelines The comparison with guidelines is subdivided to address the different receptorr Local workers in the immediate area - Workers in the immediate area of the release could be exposed to a significant uranium dose and/or HF exposure. In the event of a release, the plant see and flee policy requires personnel to evacuate the area for their own protection. The essential method of detection for workers within these facilities is (1) visual indication of a " white smoke" (i.e., reaction products of UF.
and moisture) or (2) the odor of HF, which is a product of the reaction of UF. and moisture. The visual indication or the odor of HF will provide indication of(1) the occurrence of a release and (2) the need for the workers to evacuate the area of the release.
l Operationalpersonnelin the OMR/ Lab - There are no required operator actions for this event.
Therefore, the actions for this area are no different than those for the local worker.
4.3-114
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