ML022830276
| ML022830276 | |
| Person / Time | |
|---|---|
| Site: | Hatch, Perry, Pilgrim, Brunswick, North Anna, Duane Arnold, FitzPatrick |
| Issue date: | 09/30/2002 |
| From: | Post J General Electric Co |
| To: | Burgess S, Henson J, Hodge C, Kennedy K, Meyer G Office of Nuclear Reactor Regulation, NRC Region 1, NRC/RGN-II, NRC/RGN-III, NRC Region 4 |
| References | |
| MFN 02-061 02-06NRC.DOC | |
| Download: ML022830276 (6) | |
Text
U.S. Nuclear Regulatory Commission Operations Center Event Report General Information or Other (PAR)
Event#
39232 Rep Org: GENERAL ELECTRIC COMPANY Notification Date I Time: 09/30/2002 17:06 (EDT)
Supplier: GENERAL ELECTRIC COMPANY Event Date / Time: 09/30/2002 (PDT)
Last Modification: 09/30/2002 Region: 4 Docket #:
City: SAN JOSE Agreement State: Yes County:
License #:
State: CA NRC Notified by: JASON S. POST (fax)
Notifications: GLENN MEYER R1 HQ Ops Officer: MIKE NORRIS VERN HODGE NRR Emergency Class: NON EMERGENCY JAY HENSON R2 10 CFR Section:
SONIA BURGESS R3 21.21 UNSPECIFIED PARAGRAPH KRISS KENNEDY R4 PART 21.21 REPORT REGARDING MAIN STEAM ISOLATION VALVE OUT OF SERVICE "This letter provides final notification of a Reportable Condition under 1 OCFR 21.21 (d), as committed in the Reference letter. It was previously submitted as a Reportable Condition for Brunswick Units 1 & 2 and as a 60 Day Interim Report per §21.21 (a)(2) for other plants that may be determined to be affected.
"The evaluation has been completed and it has been determined that in addition to Brunswick 1 & 2, this is a Reportable Condition for Duane Arnold, FitzPatrick, Hatch 2, Nine Mile Point 2, Perry 1 and Pilgrim. The basis for this conclusion is that GE Nuclear Energy (GE) analyses for these plants to justify operation at greater than 75% of rated power with one Main Steam line Isolation Valve (MSIV) Out of Service (OOS) (i.e., one steam line isolated) did not adequately address the long term impact of increased flow induced vibration on the remaining open MSIVs.
Without a supporting bases, it cannot be assured that the open MSIVs would be able to perform their required safety function following extended operation at greater than 75% of current rated power with one steam line isolated. This could possibly result in offsite doses in excess of 1 OCFR 100.11 limits.
"The actual impact of this condition would only be of concern if MSIV operability had not been demonstrated*
following extended plant operation at greater than 75% of current rated power with one MSIV OOS, or if a plant was currently in extended operation at greater than 75% of rated power with one MSIV OOS.
"All other plants which have an MSIV 0OS analysis provided by GE were either limited to 75% of rated power, or the impact of long term operation on the open MSIVs was adequately evaluated for the power level specified in the analysis.
"(ii) Identification of the facility, the activity, or the basic component supplied for such facility or such activity within the United States which fails to comply or contains a defect:
"The Main Steam Line Valve Out-of-Service analysis for:
Utility Plant Name 0913012002 Page I
U.S. Nuclear Regulatory Commission Operations Center Event Report General Information or Other (PAR)
Event #
39232 Carolina Power & Light Brunswick 1 and 2 Nuclear Management Co.
Duane Arnold Entergy Nuclear Northeast FitzPatrick, Pilgrim Southern Nuclear Operating Co.
Hatch 2 Constellation Nuclear Nine Mile Point 2 First Energy Nuclear Operating Co.
Perry 1
"(iii) Identification of the firm constructing the facility or supplying the basic component which fails to comply or contains a defect:
"GE Nuclear Energy, San Jose, California
"(iv) Nature of the defect or failure to comply and safety hazard which is created or could be created by such defect or failure to comply:
"The MSIV OOS analysis performed by GE evaluated plant operation at greater than 75% of rated power with three active steam lines and one steam line isolated. The GE analysis for the affected plants did not address the effect of potential long-term flow induced vibration degradation on the open MSIVs, including the effect on the MSIV air operated controls. Without adequate justification, it cannot be assured that the open MSIVs would close following extended operation with one MSIV OOS at greater than 75% of current rated power.
"If it is postulated that the plant operated for an extended period in the MSIV OOS condition and then a main steam line break were to occur in one of the three operational steam lines, then there is the potential that MSIVs would not close to terminate the release from a steam line break either from a common mode failure of both MSIVs, in the broken line, or failure of one MSIV due to the high flow induced vibration and the other MSIV as the design basis single failure. This condition would result in an un-terminated release, which would exceed the existing 10 CFR 100 radiation release limits.
- (v) The date on which the information of such defect or failure to comply was obtained:
"June 24, 2002
"(vi) In the case of a basic component which contains a defect or failure to comply, the number and locations of all such components in use at, supplied for, or being supplied for one or more facilities or activities subject to the regulations in this part:
"A defect has been confirmed to exist in analysis provided by GE for Brunswick 1 and 2, Duane Arnold, Fitzpatrick, Pilgrim, Hatch 2, Nine Mile Point 2, and Perry 1.
"(vii) The corrective action which has been, is being, or will be taken; the name of the, individual or organization responsible for the action; and the length of time that has been or will be taken to complete the action (note, these are actions specifically associated with the identified Reportable Condition):
"GE has communicated to the affected plants the 75% power limitation when operating with one MSIV OOS.
"GE has revised existing internal engineering and program processes to explicitly screen any limiting configurations/conditions for current and future MSIV OOS evaluations.
"(viii) Any advice related tp the defect or failure to comply about the facility, activity, or basic component that has been, is being, or will be given to purchasers or licensees:
"GE recommends limiting operation to 75% of current rated power when operating with one MSIV OOS, unless there is an adequate justification to support extended operation at a higher power level."
Page 2 0913012002
SEP 36-'=02 02:01PM GE NUCLEAR ENERGY P.1/4 GE Nuclear Energy General £Eletric Company 175 Cunner Ave., San Jovr, CA P.5125 September 30,2002 02-06NRC.DOC MEN 02-061 Document Control Desk United States Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738
Subject:
Main Steam Line Valve Out-of-Service Final Report
Reference:
Letter from Jason Post (GENE) to Document Control Desk (NRC), "Main Steam Line Valve Out-of-Service," MFN 02-049, August 23, 2002 This letter provides final notification of a Reportable Condition under 10CFR 21.21(d),
as committed in the Reference letter. It was previously submitted as a Reportable Condition for Brunswick Units 1&2 and as a 60 Day Interim Report per §21.21(a)(2) for other plants that may be determined to be affected.
The evaluation has been completed and it has been determined that in addition to Brunswick 1 &2, this is a Reportable Condition for Duane Arnold, FitzPatrick, Hatch 2, Nine Mile Point 2, Penry 1, and Pilgrim. The basis for this conclusion is that GE Nuclear Energy (GE) analyses for these plants to justify operation at greater than 75% of rated power with one Main Steam line Isolation Valve (MSIV) Out of Service (QOS) (i.e., one steam line isolated) did not adequately address the long term impact of increased flow induced vibration on the remaining open MSIVs. Without a supporting bases, it cannot be assured that the open MSIVs would be able to perform their required safety function following extended operation at greater than 75% of current rated power with one steam line isolated. This could possibly result in offsite doses in excess of IOCFR 100.11 limits.
The actual impact of this condition would only be of concern if MSIV operability had not been demonstrated following extended plant operation at greater than 75% of current rated power with one MSIV GOS, or if a plant was currently in extended operation at greater than 75% of rated power with one MSIV 0OS.
All other plants which have an MSIV QOS analysis provided by GE were either limited to 75% of ratea power, or the impact of long term operation on the open MSIVs was adequately evaluated for the power level specified in the analysis.
SEP 30 '02 02:02PM GE NUCLEAR ENERGY September 30,2002 02-06NRC.DOC MFN 02-061 If you have any questions, please call me at (408) 925-5362.
Sincerely, Jason. S. Post, Manager Engineering Quality and Safety Evaluations cc: S. D. Alexander (NRC-NRR/DISP/PSIB) Mail Stop 6 F2 G. C. Cwalina (NRC-NRRIDISP/PSIB) Mail Stop 6 F2 J. F. Klapproth (GE-NE)
H. J. Neems (GE-NE)
PRC File
Attachment:
- 1. Reportable Condition Evaluation per §21.21(d) 2 P. 2/4 I
SEP 30 '02 02:02PM GE NUCLEAR ENERGY September 30, 2002 02-06NRC.DOC MFN 02-061 - Reportable Condition per §21.21(d)
(i)
Name and address of the individual informing the Commission:
Jason S. Post, Manager, Engineering Quality & Safety Evaluation, GE Nuclear Energy, 175 Curtner Avenue, San Jose, CA 95125 (ii)
Identification of the facility, the activity, or the basic component supplied for such facility or such activity within the United States which fails to comply or contains a defect:
The Main Steam Line Valve Out-of-Service analysis for:
Utility Plant Name Carolina Power & Light Brunswick 1 and 2 Nuclear Management Co.
Duane Arnold Entergy Nuclear Northeast FitzPatrick, Pilgrim Southern Nuclear Operating Co.
Hatch 2 Constellation Nuclear Nine Mile Point 2 First Energy Nuclear Operating Co.
Perry 1 (iii)
Identification of the firm constructing the facility or supplying the basic component which fails to comply or contains a defect:
GE Nuclear Energy, San Jose, California (iv)
Nature of the defect or failure to comply and safety hazard which is created or could be created by such defect or failure to comply:
The MSIV OOS analysis performed by GE evaluated plant operation at greater than 75% of rated power with three active steam lines and one steam line isolated.
The GE analysis for the affected plants did not address the effect of potential long term flow induced vibration degradation on the open MSIVs, including the effect on the MSIV air operated controls. Without adequate justification, it cannot'be assured that the open MSIVs would close following extended operation with one MSlV 0OS at greater than 75% of current rated power.
If it is postulated that the plant operated for an extended period in the MSIV QOS condition and then a main steam line break were to occur in one of the three operational steam lines, then there is'the potential that MSIVs would not close to terminate the release from a steam line break either from a common mode failure of both MSIVs, in the broken line, or failure of one MSIV due to the high flow induced vibration and the other MSIV as the design basis single failure. This condition would result in an un-terminated release, which would exceed the existing 10 CFR 100 radiation release limits.
3 P. 3I/4
SEP 30 '02 02:02PM GE NUCLEAR ENERGY September 30, 2002 02-06NRC.DOC MFN 02-061 (v)
The date on which the information of such defect or failure t6 comply was obtained:
June 24,2002 (vi)
In the case of a basic component which contains a defect or failure to comply, the number and locations of all such components in use at, supplied for, or being supplied for one or more facilities or activities subject to the regulations in this part:
A defect has been confirmed to exist in analysis provided by GE for Brunswick 1 and 2, Duane Arnold, Fitzpatrick, Pilgrim, Hatch 2, Nine Mile Point 2, and Per'
- 1.
(vii)
The corrective action which has been, is being, or will be taken; the name of the, individual or organization responsible for the action; and the length of time that:
has been or will be taken to complete the action (note, these are actions specifically associated with the identified Reportable Condition):
GE has communicated to the affected plants the 75% power limitation when operating with one MSIV OOS.
GE has revised existing internal engineering and program processes to explicitly screen any limiting configurations/conditions for current and future MSIV QOS' evaluations.
(viii)
Any advice related to the defect or failure to comply about the facility, activity, or basic component that has been, is being, ore will be given to purchasers or licensees:
GE recommends limiting operation to 75% of current rated power when operating with one MSIV OOS, unless there is an adequate justification to support extendctd operation at a higher power level.
4 P. 41'4