IR 05000280/1988004
| ML18152B135 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 05/04/1988 |
| From: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Cruden D VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 8805120043 | |
| Download: ML18152B135 (20) | |
Text
MAY O 4 1988 Docket Nos. 50-280, 50-281 License Nos. DPR-32, DPR-37 Virginia Electric and Power Company ATTN:
Mr. D. L. Cruden, Vice President, Nuclear Operations P. 0. Box 26666 Richmond, VA 23261 Gentlemen:
SUBJECT:
ENFORCEMENT CONFERENCE SUMMARY NRC INSPECTION REPORT NOS. 50-280/88-04 AND 50-281/88-04 This letter refers to the Enforcement Conference held at our request on March 28, 198 This meeting concerned activities authorized for your Surry facilit The issues discussed at this conference related to inoperable heat tracing on certain safety related boric acid line A summary, a.. list of attendees, and a copy of your handout are enclose *
It is our opinion that this meeting was beneficial and has provided a better understanding of the inspection findings and the status of your corrective action 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 its enclosures will be placed in the NRC Public Document Roo Should you have any questions concerning this letter, please contact u Enclosures: Enforcement Conference Summary List of Attendees Handout cc w/encls:
D. L. Benson, Station Manager N. E. Hardwick, Manager - Nuclear Programs and Licensing bee w/encls:
(See page 2)
8805120043 880504 PDR ADOCK 05000280 Q
Sincerely, Original signed by M. L. Ernst (for)
J. Nelson Grace Regional Administrator
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Virginia Electric and Power Company bee w/encls:
G. Lainas, Assistant Director for Region II Reactors, NRR L. B. Engle, Projects Manager, NRR W. Troskoski, EDO NRC Resident Inspector DRS Technical Assistant Document Control Desk Commonwealth of Virginia RIIA"°f'L-c:7 FCantrell 4/;;..7/8 <i*r,on 41i,,188
RI!
~st 5/_j /88 MAY o* 4 1988
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- ENCLOSURE 1 ENFORCEMENT CONFERENCE SUMMARY The Deputy Regional Administrator opened the meeting by stating that the purpose of the meeting wa~ to review issues related to North Anna and Surr Virginia Electric and Power (VEPCO) personnel and NRC personnel introduced themselve Following the discussion of North Anria issues, the Assistant Station Manager, Nuclear Safety and Licensing, Surry, stated that the surveillance test for chemical and volume control system boric acid line heat*tracing was inadequate in that it fa i 1 ed to verify * operabi 1 i ty of the contra 11 ers for the heat tracing, and that management had failed to ensure that corrective action was taken to correct the constant alarms on the boric acid heat tracin He described how the system was supposed to work, the history of the iJ1stallation of the present system, corrective action taken, and the safety significanc He stated that corrective action was initiated promptly when the problem was identified.bY the Resident Inspector, and that all safety-related alarms have now been cleare Some annunciators remain on for nonsafety-related portions of the syste The meeting was concluded by the Deputy Regional Administrato *
ENCLOSURE 2 LIST OF ATTENDEES Virginia Electric and Power Company W. L. Stewart, Senior Vice President D. S. Cruden, Vice President G. E. Kane, Assistant Station Manager, Operations and Maintenance M. L. Bowling, Assistant Station Manager (North Anna)
E. S. Grecheck, Assistant Station Manager (Surry)
G. L. Pannell, Director, SEC R. S. Hardwick, Jr., Corporate Manager, Quality Assurance N. E. Hardwick, Manager, Licensing J. P. Maciejewski, Manager, ISI/NDE R. F. Driscoll, Manager, Quality Assurance H. V. Le, Plant Engineer Nuclear Regulatory Commission M. L. Ernst, Deputy Regional Administrator A. F. Gibson, Director, Division of Reactor Safety (DRS)
C. W. Hehl, Deputy Director, Division of Reactor Projects (DRP)
B. A. Wilson, Chief, Branch 2, DRP C. A. Julian, Chief, Operations Branch, DRS
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C. P. Patel, Project Manager, Office of Nuclear Reactor Regulation (NRR)
L. B. Engle, Project Manager, NRR G. A. RAli~1~. Chi~f~ Quality Assurance Programs Section, DRS J. J. Blake, Chief, Materials and Processes Section, DRS T. J. Sullivan, Chief, Mechanical Engineering Branch, NRR J. L. Caldwell, Senior Resident Inspector, North Anna L. E. Nicholson, Resident Inspector, Surry R. D. Gibbs, Reactor Inspector M. C. Shannon, Reactor Inspector K. R. Jury, Reactor Inspector E. H. Girard, Reactor Inspector L. M. Slack, Enforcement and Investigation Coordination Assi~tant B. Uryc, Senior Enforcement Coordinator
ENCLOSURE 3 ENFORCEMENT CONFERENCE ON SURRY POWER STATION MARCH 28, 1988
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- INADEQlJATE HEAT TRACING SURVEILLANCE
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- I FUNCTI.ONAL DESCRIPTION I PURPOSE:
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Maintain cvc:s fluid temperature above that at which the 7% boric acid solution could begin to precipitate
- eves boric acid tanks to charging pump is one of two required flow paths of boric acid to the core*
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Filter To Charging Pumps Via Blender or Emergency Borate Boric Acid Tanks
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Boric Acid Transfer Pumps Filter Unit 2
Normal Charging SI Hot Leg Cold Legs VOLUME CONTR TANK
FG iJ;&-'.
Blender From
~~---~~-]~-------- RWST
, CHARGING PUMPS
Control modules Control modules
"'° Overtemp
,u,*
"" Setpoint
,u,
" Undertemp
,u,
_______a
.__,-;:: _____________ ~
PANEL 2A-1 PANEL 28-1 Power Relay Master Alarm Relays LOAD FREQUENCY CONTROL PANEL Heat Tracing Lights Power On-Dim Alarm-Bright VENTILATION PANEL eves Heat Trace Trouble Alarm
- HEAT :TRACING HISTORY I Original Heat Tracing System Unreliable
- Frequent tape burnouts
- Frequent LERs New Thermon heat tracing installed and calibrated in 1981 I
V Control setpoints reset in 1984 for boric acid concentration reduction Setpoints verified following eve~ pipe replacement:
Unit 1 - December 1984 Unit 2 - May 1985
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2/12/88 Resident Inspectors meet with station management (1700) to discuss h1eat tracing concerns:
- control room annunciator/circuit status lights
- inconsistent module indicator lights
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EWR 88-038A f(?r s~tpoint calibrations approved
..r I ' '
e Continue to monitor ~
path temperatures
(2100) One train of heat trace circuits calibrated *
Exited 6hr clock 2/20/88 Redundant cir:cuits calibrated (1430) Exited 24hr clc:>ck 2/22/88 Further investigation of heat trace control and power circuits - Dela\\red relay operation noted on panel 2~1 - Panel placed under manual administrative control 2/26/88. Panel 2A1 power supply replaced and correct operation verified
I CAUSES~
- Inadequate surveillance procedures Post-modification tests were satisfactory Existing surveillance tests not revised to
. include control system
- Verified heat tape operation
- Control syste_m not verified
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- I coRfEcTIVE ACTIONS I IMMEDIATE - Initial recalibration of 'control and alarm u
setpoints
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Functional tests of.control circuits
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Components replaced as necessary
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Temperature on required flow paths
. monitored
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- l,coN;RECTIVE ACTIONS I ADDITIONAL ACTION!, COMPLETED
- Monthly sur,,.eillance test written to verify setpoint and relay operation - Tests have been performed
- Calibration procedures written
- Annunicator response procedure.revised
- Operational checklist for panel monitoring implemented
- Other (non TS) heat tracing panels verified operable
- Aggressive program to clear HT alarms
I COR~ECTIVE ACTIONS I CONFIGURATION CONTRO*L
- More detailed review of DCP* and EWR Technical Reviews (p_reviously implemented)
- Outstandi~g long term procedure changes placed on commitment tracking (1986)
- Emphasis on completion of procedure
. changes prior to restoring modified systems to operation (1987)
I coRfEcr1vE ACTIONS I I
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PROGRAMMATIC {continued)
- Annunciator "Black" board program
- System Engineers on-site
I SAFETY SIGNIFICANCE I
- The flow path from the RWST to the charging pump suction is not heat traced, and was unaffected. This flow path is the only path that is considered in the accident analysis
- Multiple heat trace circuits on each flow path
- Temperatures remained above the boron precipitation point
- No flow obstructions in the required flow paths
- l CONCLUSIONS I
- Surveillance procedures did not test the control portions of the heat tracing circuits
. - Fluid temperatures remained acceptable No flow obstructions observed
- Aggressive corrective actions fo*llowing determination of deficiencies
- Safety Injection flowpaths unaffected
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