ML20207H169
| ML20207H169 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 08/09/1988 |
| From: | Murley T Office of Nuclear Reactor Regulation |
| To: | Irving S IRVING, S.M. |
| Shared Package | |
| ML20207H173 | List: |
| References | |
| NUDOCS 8808240380 | |
| Download: ML20207H169 (3) | |
Text
'j UNITED STATES 8
NUCLEAR REGULATORY COMMISSION o
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Docket No. 50-458 Mr. Stephen M. Irving 645 Napoleon Street i
Baton Ruuge, Louisiana 70802
Dear Mr. Irving:
I am responding to your letter of July 25, 1988 addressed to Mr. Victor Stello, Jr., Executive Director for Operations. Your letter references an NRC response to Senator John Breaux of June 27, 1988, regarding concerns raised in your letter of May 23, 1988. Your latest letter expresses concern that NRC's response to Senator Breaux did not address the question of the lag time to put the prompt notification system into operation, and it also connents on the flow path of the stored water should there be a failure of the condensate storage tank.
Our letter of June 27, 1988 explained that the Gulf States Utilities Company (GSU), the licensee for the River Bend Station (RBS), is taking steps to improve the prompt notification system to reduce the inadvertent actuation of sirens in the parishes participating in the emergency plan.
In the automatic mode, the siren computer transceiver at the RBS emergency operations facility (EOF) converts a radio signal from the parish emergency operations center and transmits a signal to activate the sirens in the parish. Until recently, the emergency preparedness computer was normally in the automatic mode, but this mode of operation was changed to minimize siren activations by spurious radio frequency signals.
The computer transceiver at the EOF is now in the standby mode, and the concur-rence of the RBS staff is required to switch it to the automatic mode. Tempo-i rarily, this switching is done manually in the EOF by pressing a button. After declaring a General Emergency, the RBS Emergency Dir'. wr will notify the emergency preparedness staff located in the same EOF v"ding during normal shifts to put the computer in the automatic mode. During off-shifts, a security guard stationed in the same building will be notified by radio or telephone to do the same.
I understand that both the emergency staff and the security guards have received hands-on training and have demonstrated their proficiency during drills. The guards perform the building security function and only a few minutes are required to switch the computer to the automatic mode from the time the guards are notified. This relatively short time does not significantly affect prompt notification. The NRC inspection reports that address this issue are available to the public in the local public document room, Government Documents Department, Louisiana State University, Baton Rouge, Louisiana 70803.
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e Mr. Stephen M. Irving,
By October 1988, GSU intends to install remote control hardware to enable the Emergency Director in the control room to switch from the standby to the auto-matic mode. This modification should eliminate any lag time.
Your letter of July 25, 1988 also discusses the flow path the water stored in the condensate storage tank would take, should the tank fail.
Some of the water would likely flow into the grates and through the storm sewer system to the East Creek and Grants Bayou. Some of the water would also likely flow onto the soil. The NRC staff's analysis of the consequences of the failure of the condensate storage tank conservatively assumed that failure would occur directly j
af ter refueling when the tank would contain the highest radionuclide inventory.
1 The staff concluded that the radionuclide concentrations in the tank would be sufficiently low so that when the high water absorption of the soil and the high dilution capability of the Mississippi River are taken into account, the resulting radionuclide concentrations at the nearest unrestricted drinking water source would be less than the 10 CFR Part 20 limits. Accordingly, the condensate storage tank was considered acceptable. Section 15.7.3.2 of the
)
Updated River Bend Safety Analysis Report identifies the nearest municipal i
surface supply as the potable water intake on the Mississippi River at Bayou LaFourche, Louisiana, located about 87 miles downstream from the site.
I trust that this information answers your concerns.
Sincerely, Drigirn! claned b1
@o:::a:: r. " arley,/
Thomas E. Murley, Director Office of Nuclear Reactor Regulation DISTRIBUTION Docket File NRC PDR w/cy of incoming Local PDR w/cy of incoming EDO #0003864 ED0 Reading T. Murley/J. Sniezek F. Miraglia PD4 Reading D. Crutchfield L. Rubenstein 0GC-Rockville V. Stello D. Mossburg, PMAS (ED0#0003864) w/cy of incoming P. Shea W. Paulson w/cy of incoming P. Noonan 1
PD4 Green Ticket File T. Martin (12G18)
F. Gillespie R. %Ab
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kl>> {h(t h EDO Principal Correspondence Control FROM:
DUE: 08/12/88 EDO CONTROL: 0003864 DOC DT: 07/25/88 FINAL REPLY:
Stophen M.
Irving Baton Rouge, Louisiana TO:
Victor Ste1Io FOR SIGNATURE OF:
- GRN CRC NO:
Murley DESC:
ROUTING:
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REQUESTING INFO RE NOTIFICATION SYSTEMS IN RMartin qq*
OPERATIONS - INCIDENT OCCURING AT RIVER DEND O(p STATION 1
DATE: 08/01/88 ih ASSIGNED TO:
CONTACT:
U NRR Murley
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' SPECIAL INSTRUCTIONS OR REMARKS:
f Rsf. EDO 3769 NRR RECEIVED: AUGUST 1, 1988 ACTION:
DRSPICRU'ICHFIELDj a NRR ROUTING:
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MIRAGLIA MARTIN i
ACTION _
GILLESPIE MOSSBURG DUE TO NRR DIRECTOR'S OFFIC BY 4 ~ 7 ?> #
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