ML17221A368
| ML17221A368 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 08/27/1987 |
| From: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Woody C FLORIDA POWER & LIGHT CO. |
| References | |
| NUDOCS 8709030066 | |
| Download: ML17221A368 (6) | |
Text
REGULAT
'NFORMATION DISTRIBUTION STEM <RIDS)
ACCESSION NBR: 8709030066 DOC. DATE: 87/08/27 NOTARIZED:
NO FACIL: 50-335 St.
Lu'cie Planti Unit 1
Florida Power 5 Light Co.
AUTH. NAME AUTHOR AFFILIATION GRACEi J. N.
Reg ion 2i Office of Director RECIP. NAME RECIPIENT AFFILIATION WOODYi C. O.
Florida Power h Light Co.
DOCKET 05000335
SUBJECT:
Folwards summa g of 870807 enforcement conference discussing operation of Unit 1 facility for 870608-19 w/component cooling water sos cross-connected.
Attendance list encl.
DISTRIBUTION CODE:
- IE45D, COPIES RECEIVED: LTR ENCL SIZE:
TITLE: Summary of Significant Meeting with Licensee (Part 50>
NOTES:
RECIPIENT ID CODE/NAME PD2-2 LA INTERNAL: AEOD/DOA DEDRO NRR/DREP/EPB OGC/ROED RES/DE/EIB EXTERNAL:
0 1
1 1
1 1'
1 1
1 1
RECIPIENT ID CODE/NAME TOURIGNYi E AEOD/DSP/TPAB NRR/DLPG/GAB S
ILRB 02 RGN2 FILE 01 NRC PDR COPIES LTTR ENCL 1
1 1
1 1
1 1
1 1
1 1
1 1
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 15 ENCL 14
Docket No. 50-335 License No.
DPR-67 Florida Power and Light Company
>MVTN:
Mr. C. 0.
Woody Group Vice President Nuclear Energy Department P. 0.
Box 14000 Juno
- Beach, FL 33408 Gentlemen:
SUBJECT:
MEETING
SUMMARY
REPORT NO. 50-335/87"14 This letter refers to the Enforcement Conference held at our request at the St.
Lucie 'site on August 7, 1987.-
This meeting concerned operation of the-St.
Lucie Unit 1 facility for the period June 8, 1987 to June 19,
- 1987, with the Component Cooling Water Systems cross-connected.
It is our opinion that the meeting was beneficial and provided a better understanding of inspection findings and enforcement issues.
After careful consideration of the information presented at the
- meeting, we conclude that you identified the violation at the first opportunity, the safety significance fits a
Severity Level IV, you promptly reported the
- event, you took prompt and extensive corrective actions to prevent recurrence, and it was not a violation that could reasonably be expected to have been prevented by previous corrective actions.
In order to continue to encourage and support your initiative for self-identification and corrective
- actions, we are electing not to issue a
Notice of Violation for this event.
Our records will be corrected to reflect the withdrawal of Violation 50-335/87-14-01 and Unresolved Item 50-335/87-14-02.
A copy of the meeting summary and a list of attendees is enclosed.
In accordance with Section 2.790 of the NRC's "Rules of Practice,"
Part 2, Title 10, Code of Federal Regulations, a
copy of this letter and the enclosures will be placed in the NRC's Public Document Room.
Should you have any questions concerning this letter, please contact, us.
Sincerely, QK(lid<'!a<>"d OY;
'%~OH 8 "ACE J
J.
Nelson Grace Regional Administrator
Enclosures:
(See page 2) 8709030066 870827 PDR ADQCK 05000335 Q
Florida Power and Light Company auSRV $~7
Enclosures:
1.
Meeting Summary 2.
Meeting Attendees cc w/encls:
P:
N. Harris, Vice President St.
Lucie Nuclear Plant 5.
J.
Boissy, Plant Manager
,J; B. Harper, Site gA Superintendent bcc w/encls:
QIRC Resident Inspector Document Control Desk State of Flordia RII Ql~'Wi 1 son: cdg 085 ii /87 RII DVerrelli 08/'/87 RII n
VBrownlee 08/ 487 RII RII LReyes G en ns 08/~~'V87 08/g+87 RII MErnst 08/
/87
ENCLOSURE 1
Meetin Summar An Enforcement Conference was held at the St.
Lucie site, on August 7, 1987 to discuss the cross-connection of Unit 1
Component Cooling Water Systems (CCW) from June 8,
1987 until June 19, 1987.
Mr. Ernst opened the meeting by expressing the concern that the lack of redundancy existed for 11 days and that approximately 30 shift turnovers on the status of safety related-systems failed to identify the existence of the cross-connection.
Event Discussion The details of the event are documented in Inspection Report 335/87-14 which was transmitted to the licensee on July. 28, 1987.
The licensee acknowledged the violation of redundancy.
Mr.
L.
W.
- Pearce, FPL, discussed the 'circumstances leading up to the event, cause identification and corrective actions.
On June 6,
1987, the 1B CCW Heat Exchanger was removed from service for leak repair.
The Equipment Clearance, hung on tne CCW Heat Exchanger, did not include the by-pass valves 1-SB-14169 and 1-SB-14439.
When the operator established the by-pass, he elected not to add these valves to the clearance, rather he entered 1-SB-14169 (shown on engineering drawings as locked closed) on the Valve Switch Deviation Log.
Thus when the Heat Exchanger was put back into service on June 8, 1987 only the valves listed on the clearance were independently verified to be in the proper position.
Control room indications of valve position and header flow rate would 'not provide information on the mispositioned manual valves.
On June 19, 1987 during the conduct of routine surveillance on each
The mispositioned valves were identified and repositioned within six minutes.
The licensee's investigation of the root cause included review of past clearances for cleaning CCW Heat Exchangers.(a routine maintenance operation) and determined that for the last five occasions the valves were included on the clearance; therefore, when the system was returned to service, these manual valves were independently verified.
The licensee promptly revised the clearance procedure to require listing of all valves that are repositioned, not only those in the flow path.
The licensee also reviewed the procedure for routine Safety-Related System walkdowns.
The review indicated that, similarly, only valves in the flow path were required to be independently verified.
This procedure was promptly revised to include all valves in the safety system.
The licensee conducted a further review of procedures for the Valve Switch Deviation Log
.and found that this log was being reviewed by operations
quarterly.
This procedure was revised to include daily review on the midnight shi ft.
To assure prevention of the initial event, the licensee discussed the issue with individuals involved and conducted formal training for all licensed operators.
An engineering review of the significance of the event was discussed by T. J.
- Vogan, FPL.
The system as normally operated is in a
by-pass configuration even with the manual valves closed.
Redundancy is provided by automatic closure signals to motor operated valves.
To estimate the significance of the event, the licensee used a simplified system and calculated the system failure probabilities with the valves open vs.
- closed, The results showed minimum effect on the accident failure probability for these passive type failures.
The licensee compared these with an active type failure permitted by Technical Specification LCO for one train being inoperable.
These latter results indicated a
probability of failure almost two orders of magnitude greater than the event condition.
In addition the licensee stated that although redundancy was lost there was no loss of operability of either CCW.
For completeness, the licensee evaluated the consequences of loss of the A and 8
CCM Headers.
The components serviced by the Headers include Mechanical Seals for HPSI, LPSI and Containment Spray
- Pumps, Containment Coolers and Shutdown Cooling Heat Exchanger.
Under accident conditions coolant to the pump mechanical seals is not imperative, the Containment Coolers are backed up by 2, each 100 percent, capacity spray headers, and coolant to the shutdown cooling heat exchanger could be restored before there would be a need.
Mr. Ernst thanked the licensee for a professional and technical discussion of the issues related to this event.
ENCLOSURE 2
LIST OF ATTENDEES ENFORCEMENT CONFERENCE - AUGUST 7, 1987 Florida Power and Li ht Com an J.
W. Dickey K. N. Harri s J.
S.
Odom G. J. 'Boi ssy J.
K. Hays J.
H. Barrow L.
W. Pearce P.
G. Barnes C. A. Pell R. J.
Stevens T. J.
Vogan J.
B. Harper G. J. Keller D.
H. West NRC Vice President - Nuclear Operations Vice President - St.
Lucie Vice President - Turkey Point Plant Manager - St.
Lucie Director of Licensing Operations Superintendent Operations Supervisor Power Plant Engineering Technical Supervisor Supervisor of Licensing Power Plant Engineering Project Manger Superintendent of gA - St.
Lucie Power Plant Engineering Engineer Technical Staff M. L. Ernst D.
M. Verrelli R. Crlenjak H. Bibb B. Uryc Deputy Regional Administrator, RII Chief, Project Branch 1, Division of Reactor Projects (DRP)
Senior Resident Inspector, St.
Lucie Resident Inspector, St. Lucie Enforcement Coordinator