ML20216B697
| ML20216B697 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 05/12/1998 |
| From: | Hopkins J NRC (Affiliation Not Assigned) |
| To: | Sipek J ILLINOIS POWER CO. |
| References | |
| NUDOCS 9805180350 | |
| Download: ML20216B697 (5) | |
Text
_
Mr. Joseph V. Sipek Dir ctor-Licensing Clinton Power Station P.O. Box 678 Mail Code V920 Clinton, IL 61727
SUBJECT:
INTERNATIONAL NUCLEAR EVENT SCALE EVENT REPORTING FORM
Dear Mr. Sipek:
The Nuclear Regulatory Commission (NRC) is forwar' ing the Intemational Nuclear Event Scale d
s (INES) Event Reporting Form that was disseminated regarding your recent declaration of an Alert on February 13,1998. The event involved the loss of the residual heat removal system for several hours.
The NRC participates in the INES in a limited way, as was communicated to you through Generic Letter 92-09, issued on December 31,1992 As stated in the Generic Letter, the INES rating is not intended to affect emergency classifications, event reporting to the NRC, or communications with the public. Because usage of the INES could lead to confusion with the 1
existing four-level emergency response scale used in the United States, the NRC delays the INES rating for at least one week after the event is terminated. The NRC evaluates every event classified as an Alert or higher on the U.S. emergency response scale for its INES applicability.
An INES Event Rating Form is then prepared utilizing availablo documentation pertaining to the event. Not every Alert (or higher) will necessarily receive an I !ES classification, as some may J
- be rated "out of scale." In this case, the event was classified as "below scale / level 0. A copy of the rating form is enclosed.
The NRC does not request a review or concurrence with the INES classification nor is any response requested. Please contact me if you have any questions.
Sincerely, Original signed by:
Jon B. Hopkins, Senior Project Manager Project Directorate lll-3 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation Docket No. 50-461
Enclosure:
Event Reporting Form cc w/ encl: See next page
'O DISTRIBUTION Docket File PUBLIC
'EGA1 RBellamy
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RStransky OGC l
ACRS GGrant, Rlli Document Name: G:\\CLINTON\\A _ event.ini 0FFICE PM:POIII-3 h\\/lE LA:PDIII-3 E
NAME JHopkins M
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g /I G/98 0FFICIAL RECORD COPY 9905100350 '980512 f[D {e-F" b hI h h @ % y
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l May 12, 1998 Mr. Joseph V. Sipek Dirsctor - Liccnsing
+-
Clinton Pow r Stttion P.O. Box 678 Mail Code V920 Clinton, IL 61727
SUBJECT:
INTERNATIONAL NUCLEAR EVENT SCALE EVENT REPORTING FORM
Dear Mr. Sipek:
The Nuclear Regulatory Commission (NRC) is fc: warding the Intemational Nuclear Event Scale (INES) Event Reporting Form that was disseminated regarding your recent declaration of an Alert on February 13,1998. The event involved the loss of the residual heat removal system for several hours.
The NRC participates in the INES in a limited way, as was communicated to you through Generic Letter 92-09, issued on December 31,1992. As stated in the Generic Letter, the INES rating is not intended to affect emergency classifications, event reporting to the NRC, or communications with the public. Because usage of the INES could lead to confusion with the existing four-level emergency response scale used in the United States, the NRC delays the INES rating for at least one week after the event is terminated. The NRC evaluates every event classified as an Alert or higher on the U.S. emergency response scale for its INES applicability.
An INES Event Rating Form is then prepared utilizing available documentation pertaining to the event. Not every Alert (or higher) will necessarily receive an INES classification, as some may be rated "out of scale." in this case, the event was classified as "below scale / level 0. A copy of 4
the rating form is enclosed.
j The NRC does not request a review or concurrence with the INES classification nor is any response requested. Please contact me if you have any questions.
Sincerely, Original-signed by:
Jon B. Hopkins, Senior Project Manager Project Directorate 111-3 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation Docket No. 50-461 Enclosuse: Event Reporting Form cc w/ encl: See next page DISTRIBUTION Docket File PUBLIC EGA1 RBellamy RStransky OGC ACRS GGrant, Rill Docement Name: G:1CLINTON% _ event.ini 0FFICE PM:PDIII-3 h\\/ l E LA:PDIII-3 lE NAME JHopkins
\\h EBarnhill 9[4 DATE 6 / l 3/98 l\\\\
g / IG/98 0FFICIAL RECORD COPY
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UNITED STATES j
,j NUCLEAR REGULATORY COMMISSION 2
WASHINGTON, D.C. 30866 4 001 e
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- ,o May 12, 1998 Mr. Joseph V. Sipek Director - Licensing -
Clinton Power Station P.O. Box 678 Mail Code V920 Clinton, IL 61727
SUBJECT:
INTERNATIONAL NUCLEAR EVENT SCALE EVENT REPORTING FORM
Dear Mr. Sipek:
~
The Nuclear Regulatory Commission (NRC) is forwarding the International Nuclear Event Scale (INES) Event Reporting Form that was disseminated regarding your recent declaration of an Alert on February 13,1998. The event involved the loss of the residual heat removal system for several hours.
The NRC participates in the INES in a limited way, as was communicated to you through -
Generic Letter 92-09, issued on December 31,1992. As stated in the Generic Letter, the INES rating is not intended to affect emergency classifications, event reporting to the NRC, or communications with the public. Because usage of the INES could lead to confusion with the existing four-level emergency response scale used in the United States, the NRC delays the INES rating for at least one week after the event is terminated. The NRC evaluates every event classified as an Alert or higher on the U.S. emergency response scale for its INES applicability.
An INES Event Rating Form is then prepared utilizing available documentation pertaining to the event. Not every Alert (or higher) will necessarily receive an INES classification, as some may be rated "out of scale." in this case, the event was classified as "below scale / level 0. A copy of the rating form is enclosed.
The NRC does not request a review or concurrence with the INES classification nor is any response requested. Please contact me if you have any questions.
Sincerely, Jon B. Hopkins, Se ior Project Manager Project Directorate lil-3 Division of Reactor Projects Ill/IV Office of Nuclear Reactor Regulation Docket No. 50-461
Enclosure:
Event Reporting Form cc w/ encl: See next page
Joseph V. Sipek Clinton Power Station, Unit 1 Illinois Power Company cc:
Walter G. MacFarland IV lilinois Department of Nuclear Safety Senior Vice President Office of Nuclear Facility Safety Clinton Power Station 1035 Outer Park Drive P.O. Box 678 Springfielci,IL 62704 l
Clinton,IL 61727 l
Wayne Romberg Manager Nuclear Station l
Engineering Department Clinton Power Station l
P.O. Box 678 l
Clinton,IL 61727 l
Resident inspector l
U.S. Nuclear Regulatory Commission RR#3, Box 229 A Clinton,IL 61727 R. T. Hill i
l Licensing Services Manager l
General Electric Company 175 Curtner Avenue, M/C 481 San Jose, CA 95125 l
Regional Administrator, Region 111 l
U.S. Nuclear Regulatory Commission 801 Warrenville Road l
Lisle, IL 60532-4351 Chairman of DeWitt County c/o County Clerk's Office l
DeWitt County Courthouse I
Clinton,IL 61727 l
J. W. Blattner Project Manager Sargent & Lundy Engineers 55 East Monroe Street Chicago,IL 60603
s THE INTERNATIONAL NUCTEAR EVENT SCALE (INES)
~
EVENT RATING FORM (ERF)
TO BE SENT TO THE IMA INES C04RDihATOR SY e FAX: + 4312090 29723 I
IAEA, WAGRAMERSTRASSE 5 P.O. 80x 100, A 141) VIENNA. AUSTRIA 44Al NEP IAEAORAT LOSS OF SHUTDOWN COOLING EVENT DATE E
13.02.98 RATING L^&"
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- ^'TuTE E
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rTR
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PROVISIONAL O o
2 4
s 7
ON-81TE NPACT
~
27.02.98 E
"4"' "'^C7 COUNTRY USA FACILITY CLINTON POWER STATION UNIT 1 FACILITY BWR NAME TYPE ASPECTS OF SIGNIFICANCE TO THE PUBLIC:
YES NO ACCIDENT O INCIDENT O DEVIATION E RADIOACTIVE RELEASES OFF-SITE O
E RADIOACTIVE RELEASES ON-SITE D
E WORKERS INJURED BY RADIATION O
E WORKERS INJURED PHYSICALLY O
E PLANT SAFETY IS UNDER CONTROL E
O i
THE EVENT REPORTED IS A DISCOVERY OF A DEFICIENCY BY ROUTINE SURVEILLANCE O
E A PRESS RELEASE WAS MADE E
D (IF YES, PLEASE ATTACH iT)
SHORT DESCRIPTION OF THE EVENT: On 13 February 1998, shutdown cooling of the reactor vessel was lost for several hours when suction isolation valves for the residual heat removal (RHR) system automatically closed. These valves closed due to the loss of the primary power supply to Division 2 of the Nuclear Safety Protection System, while the alternate power supply was unavailable because of maintenance. The unit had been shut down since 5 September 1996, and decay heat loads were relatively low. During the period that the shutdown cooling system was unavailable, water in the reactor vessel began to heat up at a rate of approximately 0.6*F per hour. The licensee declared an ALERT Emergency Classification at the discretion of the control room supervisor, who desired to bring additional personnel onsite to assist in restoring the RHR system. The RHR system was restarted approximately six hours after the initial event.
JUSTIFICATION OF THE RATING: This event is rated at level 0/below scale in accordance l
with Part III-3.1.1 of the INES Users Manual as a minor change in coolant temperature due to some l
degradation of cooling with a comparable large time available for corrective actions.
CONTACT NAME Richard J. Barrett PERSON ADDRESS USNRC, Washington, DC 20555 PHONE (301) 415-7482 FAX (301) 816-5151 PLEASE ATTACH ADDmONAL INFORMATION ON JUSTIFICATION OF THE EVENT RATING AND DIFFICULTIES ENCOUNTERED, IF NEEDED Enclosure J
l l
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