ML052270075

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Transcripts of Telephone Conversations at NRC Hq During the Millstone Alert Declaration on April 17, 2005 - Event Number 41607. Commission Assistant, 13:05-13:27
ML052270075
Person / Time
Site: Millstone  Dominion icon.png
Issue date: 04/17/2005
From:
NRC Region 1
To:
References
41607, FOIA/PA-2005-0207, NRC-372
Download: ML052270075 (21)


Text

(P Official Transcript of Proceedings NUCLEAR REGULATORY COMMISSION

Title:

-, I Telephone Conversations at

..- T NRC Headquarters during

_owrI the Millstone Alert Declaration on April 17, 2005 C-DI Event Number: 41607 Location: (telephone conference)

Tape: COMMISSION ASSISTANT, 13:05-13:27 Work Order No.: NRC-372 Pages 1-19 NEAL R. GROSS AND CO., INC.

Court Reporters and Transcribers 1323 Rhode Island Avenue, N.W.

Washington, D.C. 20005 (202) 234-4433

1 1 UNITED STATES OF AMERICA 2 NUCLEAR REGULATORY COMMISSION 3

4 HEADQUARTERS OPERATIONS CENTER 5

6 TELEPHONE CONVERSATION(S) 7 RE MILLSTONE ALERT DECLARATION 8 OF APRIL 17, 2005 9

10 EVENT NO. 41607 11 Commission Assistant Bridge 9, 13:05-13:27 12 13 14 15 16 17 18 19 20 21 22 23 24 25 NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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2 1 P-R-O-C-E-E-D-I-N-G-S 2 13:05 3 MR. HEADQUARTERS OPERATIONS OFFICER: This 4 is Headquarters Operations Officer. I believe we have 5 everyone up on the Commissioner Assistant's Briefing 6 Bridge, and that bridge is cross tide now with the ET 7 Bridge.

8 Mr. Lanning, at Region I, are you on the 9 bridge, sir?

10 MR. LANNING: Yes.

11 MR. HEADQUARTERS OPERATIONS OFFICER: Mr.

12 Dyer, can you hear me in the ET room, sir?

13 MR. DYER: Yes. I can.

14 MR. HEADQUARTERS OPERATIONS OFFICER: All 15 right. With your permission, Mr. Lanning, I 16 understand you're going to conduct the brief. I'll 17 execute a roster playback so we can find out who's on 18 the bridge.

19 MR. LANNING: Okay.

20 ELECTRONIC VOICE: There are currently 18 21 participants in your conference. The following people 22 are in the conference.

23 MR. COE: Douglas Coe, Office of 24 Commissioner Lyous.

25 MR. RAMSEY: Jack Ramsey, International NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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3 1 Programs.

2 MR. BRENNER: Eliot Brenner, Headquarters 3 Public Affairs.

4 MR. LEE: Sam Lee, Office of the EDO.

5 MR. ANDREWS: Tom Andrews, Region 4.

6 MR. JONES: Andrew Jones, Region 4.

7 MR. CROTEAU: Rick Croteau, Chairman's 8 office.

9 MR. MARSH: Tad Marsh, NRR.

10 MS. VIETTI-COOK: Annette Vietti-Cook, 11 Office of the Secretary.

12 MR. REIS: Jerry Reis, Commissioner 13 Jaczko's office.

14 MR. GIITTER: Joe Giitter, NMSS.

15 MR. NERSES: This is Vic Nerses, NRR, 16 Project Manager, Millstone 2, backup Millstone 3.

17 MS. HAYDEN: Beth Hayden, Public Affairs.

18 MR. WEBER: All right. This is Mike Weber, 19 NSIR.

20 ELECTRONIC VOICE: Roster playback is 21 complete.

22 MR. BLOUGH: Okay. And in the Region, this 23 is Randy Blough and Wayne Lanning's here and Wayne's 24 a IRC manager, I'm the assistant. Also with us are 25 Diane Screnci, John White, Jim Trapp, Paula NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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4 1 (inaudible), Jim Wiggins. We have a few others that 2 are not participating in the call.

3 MR. HEADQUARTERS OPERATIONS OFFICER: Okay, 4 Headquarters Operations Officer. I believe there are 5 a number of people on the bridge that were not called 6 out on the roster playback. If they could identify 7 themselves?

8 MS. HARRINGTON: Holly Harrington, Public 9 Affairs.

10 MR. JONES: Brad Jones, Commissioner 11 McGaffigan's office.

12 MR. LANNING: Okay. And we also have Max 13 Schneider who's at the site and cannot be part of the 14 briefing.

15 We've been following an incident, ahh an 16 interesting transient, at Millstone that has put the 17 plant in an alert and put the region in the monitoring 18 phase.

19 We've got a full regional audience of 20 response center staff here, including a Government 21 liaison manager, public affairs manager, a full 22 reactor safety team and others. We've been 23 coordinating though a Government liaison manager with 24 the states of New York and Connecticut and FEMA I.

25 Our public affairs is prepared to respond NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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5 1 to press inquiries regarding the event, although we've 2 had none. We plan to prepare a press release. The 3 company's had a number of press inquiries and has 4 issued one press release.

5 As I said, the plants in an alert. They 6 may be ready to terminate now. It's an interesting 7 transient that will require us to follow up on our 8 part. There were no significant releases from the 9 plant and no real hazard to the public as it turns 10 out.

11 We have Max Schneider who's been following 12 this event. In fact he's on of three inspectors on 13 site - he is the Senior Resident, and he's going to 14 take you through the technical details of what 15 happened this morning.

16 Go ahead, Max.

17 MR. SCHNEIDER: Okay. Good afternoon.

18 8:29 this morning, Millstone, Unit 3 experienced an 19 automatic reactor trip. Alpha-train safety injection 20 actuation system actuated and Alpha-train main steam 21 isolation from a Bravo steam generator low steam line 22 pressure. Operators followed up with manual 23 initiations. Note that the Bravo-train, SIAS and the 24 HD isolation did not actuate. Steam generator safety 25 on Bravo and Charlie steam generators opened and NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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6 1 stayed open and then cycled until they stabilized 2 about 15 minutes later. For your information there 3 are five safeties each steam generator.

4 At 08:42, operators declared an alert 5 based on unisolable steam line leak outside 6 containment and in accordance with their emergency 7 action level tables due to steam generator safety 8 staying open.

9 Pressurized Porus and safeties lifted and 10 reseated due to the primary plant going solid on the 11 pressurizer from the safety injection. The highest 12 primary pressure that they saw was approximately 2,345 13 pounds.

14 PRT level increased. This is where the 15 safeties and Porus relieved to, pressure relief tank, 16 the PRT level increase to approximately 82 percent, 17 pressure was approximately 70 pounds. The ruptured 18 disk, which ruptures about 86 to 100 pounds, did not 19 rupture.

20 Complications to the event, the Alpha-21 train of SI-MSI actuated only. Turbine driven aux 22 feedwater pump, one of three, two motor driven and one 23 turbine driven, tripped when called upon. That has 24 since been reset and is working properly.

25 One steam generator's safety lifted NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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7 1 approximately 40 pounds below its set point, it lifted 2 about 1140 pounds as compared to 1180 pounds lift set 3 point.

4 Additionally, a charging system valve, 5 661, on Alpha charging pump recirculation line valve 6 had a packing leak that had a significant steam plume 7 associated with it. That has since been isolated and 8 they have not had any indications of airborne 9 contamination or releases into the auxiliary building.

10 That's something to follow up on.

11 Current plant conditions; they are 12 removing heat via the atmospheric dump valve bypass 13 valves. On a main steam isolation, basically you're 14 isolating the steam generators, - so the MSIVs are 15 shut, their bypasses are shut, atmospheric dump valves 16 are shut and accordingly when you button up a steam 17 generator you get the safeties lifting.

18 Pressurizer level is currently 53 percent, 19 pressure approximately 2260 pounds, temperature 20 approximately 558 degrees. The steam generator levels 21 are approximately 69 percent and pressure is around 22 1200 pounds, or I mean 1100 pounds. The PRT level is 23 82 percent and 75 pounds. The licensee is in a 24 procedure where they charge to the PRT to reduce 25 temperature and then subsequently drain the PRT.

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8 1 Primary sample has been drawn. There are 2 not results yet. And they're also looking at steam 3 generator secondary samples to ensure there's no 4 primary to secondary leak.

5 Current activities, the licensee has 6 activated the site emergency response organization.

7 Both the technical support center and your emergency 8 operations facility are activated. Along that lines 9 I responded to the site this morning and two residents 10 that work for me are here, Kevin Mangen, Silas 11 Kennedy. Kevin is in the Unit 2/3 control room with 12 me. Silas is responding to the TSC.

13 The tampering investigation is in 14 progress. There are no results yet, but there are 15 also no indications of tampering at this point. TSC 16 is leading that effort.

17 The licensee remains in alert and is 18 evaluating termination criteria. According to the 19 licensee, the termination criteria would be getting 20 containment pressure back in the normal band.

21 When they initiated the safety injection 22 actuation signal, they lost their containment 23 chillers' nonsafety related modes, which trip on SI.

24 As a result, currently containment pressure is 25 approximately 14 pounds. Normally they maintain at NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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9 1 bout 13.5. Containment chillers have been restored 2 and they're looking at getting that containment 3 pressure back down. That's the only one of their 4 alert criteria that they've discussed.

5 Unit 2, outage activities: Unit 2 is in an 6 outage. They intended to do an RCS drain down drain 7 down below the head flange today. Unit 2's 8 significant outage activities are on hold until they 9 evaluate and decide to deactivate the (inaudible).

10 The licensee is reviewing tech specs.

11 They are in tech spec 3.7.1. That's for steam 12 generator code safeties. It takes six hours to get to 13 hot standby and a subsequent six hours to get the hot 14 shutdown.

15 And then following on, they will need to _

16 investigate the initiator and determine electronic 17 failure or actual low main steam line pressure.

18 I really haven't got a solid indication 19 from the licensee as to the understanding which 20 occurred first, the low steam generator pressure 21 causing the SI, MSI, and SIAS or actual steam 22 generator relief lifting causing a low steam line 23 pressure.

24 That's what I have Randy.

25 MR. PARTICIPANT: May I just add a couple NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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10 1 points. They were not operating with any known fuel 2 leakers and they've completed the chemistry on three 3 of the four steam generators, and they're not 4 detecting any indication of primary/secondary leakage.

5 MR. SCHNEIDER: That's correct.

6 MR. LANNING: So our plant's gone forth, 7 then are to continue to monitor their efforts from the 8 site and the Region 1 IRC calling upon headquarters as 9 we need them.

10 It looks like the plant is at a stable hot 11 shutdown now with a need to continue to watch that 12 pressurizer relief tank where the primary reliefs 13 discharges to. And then the plant plans to go on and 14 cool down.

15 So we'll be monitoring their efforts. We 16 think the licensee of these probably will be de-17 escalating from an alert fairly soon here. I guess 18 we're ready at this point for questions that you might 19 have.

20 MR. GIITTER: This is Joe Giitter. Could 21 you talk about the turbine driven aux feedwater pump 22 again?

23 MR. HEADQUARTERS OPERATIONS OFFICER: Go 24 ahead, Max.

25 MR. SCHNEIDER: In response to the event, NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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11 1 the reactor tripped. The turbine driven and motor 2 driven aux water pumps start to feed the steam 3 generators. In this case, the turbine driven aux 4 feedwater pump, when it was asked to start, it started 5 and then tripped. Subsequently they reset it and it 6 is currently working correctly. That would be a 7 followup activity to determine why it tripped.

8 MR. GIITTER: Could you also explain again, 9 please, the -- you said -- I'm not quite sure, did the 10 a-train SI actuation occur before or after the a-train 11 main steam isolation valve closure?

12 MR. SCHNEIDER: The Alpha-train safety 13 injection actuation signal and main steam isolation 14 signal came in. And that comes in on one of things, 15 on a low steam line pressuring. And that did come in 16 on the Alpha-train, but not the Bravo-train. And 17 that's another thing that needs -- this licensee needs 18 to understand.

19 MR. GIITTER: And the steam generators, B 20 and C, in which the safety valves opened, were 21 associated with the a-train?

22 MR. SCHNEIDER: This is Alpha-train in 23 terms of electronics. You have four steam generators, 24 A, B, C, and D.

25 MR. NERSES: Max, this is Vic Nerses.

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12 1 MR. SCHNEIDER: Yep.

2 MR. NERSES: What's the normal PRT level 3 they operate at?

4 MR. SCHNEIDER: They do operate with a 5 level I'm not sure, I'm thinking 40/50 percent, but I 6 really wouldn't want to pass that along as fact here. _=

7 I'll have to find that out.

8 MR. NERSES: Okay.

9 MR. REIS: Max, Terry Reis. Would you 10 please go over one more time the current heat removal 11 methodology?

12 MR. SCHNEIDER: It's atmosphere dump valves 13 have bypass valves. Now the ADV's, when you have an 14 MSI, they get a signal to close, they're buttoning up 15 the steam generator. And so that MSI signal is not 16 yet reset. If they reset the signal, then they could __

17 operate them manual electric, if you will. But right _

18 now, they're controlling the decay heat using the 19 bypasses around those valves.

20 MR. REIS: Okay. Thank you.

21 MR. NERSES: Okay. So, I just wanted to 22 follow up on that question that I had on the a-train 23 low steam line pressure, there was not an associated 24 b-train low steam line pressure. Correct?

25 MR. SCHNEIDER: Right. If you had a Bravo-NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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13 1 steam generator main steam line actual low pressure, 2 you would expect the Alpha and Bravo reactor 3 protection systems to pickup on that and generate an 4 ESF actuation and have a SIS and an MSI. That didn't 5 happen. It only happened when the Alpha-train ESF.

6 So that's unusual. You would have expected both 7 trains to have seen the same thing and come in.

8 MR. NERSES: And when that happens and the 9 a-train SI actuation occurs, how many of the four 10 steam generator isolation valves would be effected by 11 that Alpha-train low steam line pressure signal?

12 MR. SCHNEIDER: Well, it was buttoning up 13 all the steam generators.

14 MR. NERSES: All of them?

15 MR. SCHNEIDER: Yes.

16 MR. NERSES: And is that what happened?

17 MR. SCHNEIDER: Yes.

18 MR. NERSES: Okay. And then you mentioned 19 -- I thought that you said that the steam generators, 20 Bravo and Charlie, they're steam safety valves did 21 open, correct, and they actually stayed open 22 unexpectedly, and then they closed, and then they kind 23 of cycled on and off and didn't stabilize until about 24 15 minutes later, which is unusual? But not the Alpha 25 and the Delta steam generators, they did not open?

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14 1 MR. SCHNEIDER: They did not.

2 MR. NERSES: Okay. And there are five 3 safeties on each steam generator?

4 MR. SCHNEIDER: I'm not sure the total, how 5 many on Bravo and how many on Charlie opened and 6 stayed open and then cycled.

7 MR. NERSES: Okay. I see. Thank you.

8 MR. MARSH: I'm Tad Marsh. Are those 9 safeties in the same area, the same vicinity, 10 Bravo/Charlie, generator C? Do you know?

11 MR. SCHNEIDER: Excuse me?

12 MR. MARSH: This is Tad Marsh. Are the 13 Bravo and Charlie steam generator safeties in the same 14 physical area?

15 MR. SCHNEIDER: Approximately -- I'm not 16 sure to tell you the truth. I know what you're 17 talking about and they are in the main steam safety 18 building, but I don't know if they're located right 19 next to each other.

20 MR. MARSH: I mean they're upstream of 21 their respective main steam isolation valves. Right?

22 MR. SCHNEIDER: That's correct. You have 23 both atmospheric dump valves and the steam generator 24 safeties that are upstream to the MSIVs. If you 25 needed to relieve steam generator pressure and, of NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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15 1 course, decay heat without a condenser, you can still 2 do that to atmosphere.

3 MR. MARSH: If this manual operation to 4 remove the decay heat, is that being done in the same 5 physical area as the main steam safeties or is that 6 done remotely from the control room?

7 MR. SCHNEIDER: It's done remotely from the 8 control room. It's a little more difficult to control 9 that way, then having a full AD available because they 10 because they already do it.

11 MR. MARSH: Do we have an estimate of how 12 much longer it will take to sample the fourth steam 13 generator to verify primary to secondary leakage 14 status.

15 MR. SCHNEIDER: I haven't got an estimate 16 on that.

17 Did -- Wayne, did they talk anything about 18 that from the licensee's brief?

19 MR. LANNING: Nothing more than it was 20 underway. You know, we expect it soon. And it is the 21 Delta steam line that they're evaluating. The other 22 three stream lines have been evaluated.

23 MR. SCHNEIDER: Any other questions at this 24 time?

25 MR. CROTEAU: Yes, Max. Max, this is Rick NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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16 1 Croteau. Is AFW feeding the generators right now?

2 MR. SCHNEIDER: Yes. All three.

3 MR. CROTEAU: And is there indication of 4 continued in leakage into the PRT from the PRV's, or 5 the relief valve, the safety valve?

6 MR. SCHNEIDER: Before they started the 7 procedure to cool that down and then subsequently 8 drain it, they had seen it stabilized about 82 percent 9 or so. They are still looking at the PORVs and 10 safeties. There are three pressurized safeties and 11 two PORVs. They're still looking at down stream tail 12 pipes and evaluating that. But they saw some 13 stabilization. The reason I tell you that is in order 14 to cool it down, they have to pump to the PRT from the 15 primary grade storage tank. So, they're, you know, 16 you can't -- if you're sending something in there, you 17 can't where it's coming from.

18 MR. CROTEAU: Yes. But they are not having 19 trouble with the level's not getting away from them, 20 or the pressure or anything. Is it pretty stable?

21 MR. SCHNEIDER: Right. The pressure's 22 about 70 pounds, level's about 82 percent. The 23 rupture disc ruptures between 86 and --

24 MR. CROTEAU: Yes. I guess. All right.

25 So, they're below that. Okay. Thanks.

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17 1 MR. BRENNER: Eliot Brenner for Diane 2 Screnci.

3 MS. SCRENCI: Yes.

4 MR. BRENNER: Is it your intent to put 5 anything out or just respond to query right now?

6 MS. SCRENCI: No. We're going to write a __

7 press release and put that out. -_

8 MR. BRENNER: I'm sorry. Say again.

9 MS. SCRENCI: I'm going to write a press 10 release and we're going to put that out.

11 MR. BRENNER: Okay.

12 MR. PARTICIPANT: Max, there was an earlier 13 report that that pressurizer might have gone solid.

14 Has that been withdrawn or is there any firm 15 information on that?

16 MR. SCHNEIDER: The firm information is the =

17 pressurizer did go solid. When they had a safety _

18 injection and are pumping all this water into the RCS, 19 they went solid. And that's what caused the PORVs to 20 -- or the safeties to lift on the primary side.

21 MR. PARTICIPANT: And as well, might want 22 to follow up and find that out if we got through the 23 event as with other aspects of this event because the 24 other PORVs were probably -- you're operating under 25 water environment and such and we don't know how many NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE., N.W.

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18 1 times they cycled and that sort of thing. So there'll 2 be a lot to follow up on this event, during the 3 follow up inspection.

4 MR. SCHNEIDER: Okay. Thank you. And yes, 5 that sounds good.

6 MR. PARTICIPANT: Do you know if the 7 operators have detected any evidence of a steam bubble 8 under the head?

9 MR. SCHNEIDER: Yes. The report the gave 10 us on their debrief is that 100 percent solid.

11 MR. PARTICIPANT: Okay. Thanks. No 12 bubbles. Okay. Thanks.

13 MR. CROTEAU: This is Rick Croteau again.

14 Diane, what's the main thing that you're going to 15 stress in the press release?

16 MS. SCRENCI: I haven't written yet, but 17 I'll say that the NRC's monitoring the situation. We 18 have residents there. We looking at it here and 19 there's been no detectable release.

20 MR. CROTEAU: Okay. Are you planning on 21 waiting until we hear from that fourth steam generator 22 first?

23 MS. SCRENCI: It will probably take me that 24 long anyway.

25 MR. PARTICIPANT: (inaudible)

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19 1 MS. SCRENCI: Yes. We think they're almost 2 done and I haven't even started yet.

3 MR. CROTEAU: All right.

4 MR. HEADQUARTERS OPERATIONS OFFICER: Okay.

5 Last call for additional questions.

6 MR. PARTICIPANT: Good brief, Max. Thanks 7 very much.

8 MR. SCHNEIDER: All right. Thank you.

9 (Whereupon, the phone conference ended at 10 13:27) 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 NEAL R. GROSS COURT REPORTERS AND TRANSCRIBERS 1323 RHODE ISLAND AVE.. N.W.

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CERTIFICATE This is to certify that the attached proceedings before the United States Nuclear Regulatory Commission in the matter of:

Name of Proceeding: Telephone Conversation at NRC Headquarters during the Millstone Alert Declaration On April 17, 2005 Event Number: 41607 Location: teleconference were held as herein appears, and that this is the original transcript thereof for the file of the United States Nuclear Regulatory Commission taken by me and, thereafter reduced to typewriting by me or under the direction of the court reporting company, and that the transcript is a true and accurate record of the foregoing proceedings as recorded on tape(s) provided by the NRC.

(Neady Ha-Grley -C., -

Oficial Transcriber Neal R. Gross & Co., Inc.

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(202) 234-4433 WASHINGTON, D.C. 20005-3701 www.nealrgross.com