PLA-2283, Forwards Status & Schedule for Corrective Actions Identified in Summary Scram Rept Submitted on 840813 (PLA-2268). Corrective Actions Prioritized as Listed
| ML17139C536 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 08/21/1984 |
| From: | Kenyon B PENNSYLVANIA POWER & LIGHT CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| PLA-2283, NUDOCS 8409130140 | |
| Download: ML17139C536 (25) | |
Text
Pennsylvania Power 8 Light Company Two North Ninth Street
~ Allentown, PA 18101
~ 215 i 770.5151 Bruce D. Kenyon Vice President-Nuclear Operations 215/770-7502 AU6 8 j. lsd t Dr. T. E. Murley Regional Administrator, Region 1
U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 g 8$ JPIgg
. SUSQUEHANNA STEAM ELECTRIC STATION SCRAM REPORT-ACTION ITEMS STATUS AND SCHEDULE ER 100508 FILE 847-17 PLA-2283 Docket No. 50-388
Dear Dr. Murley:
As requested by Mr. R. H. Jacobs of your office, attached is the status and schedule for the corrective actions identified in the Susquehanna SES summary scram report (Unit 2 scram-7/26/84) submitted on August 13, 1984 (PLA-2268).
The corrective actions identified in the report were prioritized.
The priority system used is as follows:
Priority Priority Priority Priority 1:
Required prior to start up of Unit 2.
2:
Short term.
3:
Long term with action plan to be completed in the short term.
4:
Required prior to performing a specific activity.
The priority 1 corrective actions required for a Unit 2 restart have been completed.
The priority 2 corrective actions as originally defined have been completed.
Additional actions required as follow up to priority 2 responses are identified and statused in Attachment l.
Attachment 2 provides a
status/schedule to corrective'actions identified as a priority 3 or 4 action.
Very truly yours, B. D. Kenyon Vice President-Nuclear Operations Attachment cc:
Mr. R. H. Jacobs NRC..Resident Inspector J5 s
8409i30140 840821 PDR ADOCK 05000388 P.
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ATTACHMENT 1 STATUS OF PRIORITY 2 ACTIONS RE UIRING FOLLOW UP 1.
Action Item No. 2-84-04-10
==
Description:==
Specify the indications available to detect a loss of Control and Trip D.C. Power to 13.8KV, 4KV Switchgear and 480V Load Center Breakers and a Loss of Auxiliary Relay and Control D.C.
Power to the 13.8KV, 4KV Switchgear and 480V Load Centers.
Action 88:
Write an Operating Instruction for proper rack out of various breaker types (to include observation/indication during sequence).
Status:
An initial review concluded that specific instructions are needed instead of a generic instruction for each of the various breaker types.
These specific Operating Instructions will be prepared and issued by September 10, 1984.
2.
Action Item No. 2-84-04-20
==
Description:==
How can an operator get a remote emergency start of the D/G's from the control or relay room?
Action 82:
Evaluate manual emergency start of the Diesel Generators.
Status:
An industry review for typical diesel start logics is being performed.
Additional reviews are being performed to determine the feasibility for changing or providing emergency manual start capabilities and to determine if the addition of an emergency manual start would change the Probabilistic Risk Assessment (PRA).
Evaluations of reviews to be completed by November 27, 1984.
3.
Action Item No. 2-84-04-26
==
Description:==
Reg.
Guide 1.47 Action //'s 1
6 2:
Does our present design meet the intent of Reg.
Guide 1.47 with respect to control power disconnect supervision, specifically the 30A fuse circuit.
Review adequacy of our present design with respect to Reg.
Guide 1.47 as associated with Control Power disconnects, specifically with Bus/DG Auxiliary relay, Control D.C. Power Knife Switch.
Status:
Surveillance procedures for the functional test of the 4KV bus degraded voltage scheme are required on a monthly basis (Position C.3.b) and are run during periods that the Class 1E systems are normally expected to be operable (Position C.3.c).
Performance of this surveillance does not disable
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control power to any of the breakers, but will disable certain functions normally part of the breaker control schemes.
The bus and its loads will automatically respond to LOCA conditions, but will not react to a loss of either or both off-site power supplies or degraded grid voltage conditions during this surveillance.
Alarms or bypass indication are being considered for this surveillance.
An additional review is required to determine feasible and effective means of providing this indication.
4.
Action Item No. 2-84-04-33
==
Description:==
Review Labeling Blackout Instrumentation Action f/1:
Evaluate advisability of Labeling Blackout Instrumentation.
Status:
To uniquely identify the instrumentation, it was concluded that colored tags with instrument tag number
& function be utilized.
Tagging will be completed by the end of the pre-commercial outage (Unit 2) and the first refueling outage (Unit 1).
5.
Action Item No. 2-84-04-36
==
Description:==
Review of RHR and CS circuit breaker response for various combinations of Motive and Control Power availability.
Examples:
a)
Closure of circuit breaker on a "dead bus".
b)
Closure of circuit breaker on a "dead bus" with no control power to under voltage relays.
Action f32:
Conduct training.
Status:
Simulator training teaches operators the effect of closing circuit breakers on a dead bus.
While this has not been specifically addressed in Training, it has been adequately covered as part of simulator training.
Lesson plans will be revised by September 28, 1984 to include specific details noted in the description.
Licensed operators will be trained to the details of this action by December 31, 1984.
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ATTACHMENT 2 SCHEDULE/STATUS OF PRIORITY 3 AND 4 ACTION ITEMS 1.
Action Item No. 2-84-04-05
==
Description:==
Verify the fuse size and types in the D.C. Control Power circuits for the 13.8KV and 4KV Switchgear, 480V Load
- Centers, 250VDC and 125VDC Load Centers and D/G Cabinets in Units 1 and 2.
Action /f2:
Complete the As-Built verification of fuse size, fuse type and labeling in all 4KV, 13,8KV, 480V LC's, and 250VDC and 125 VDC Load Centers, and D/G Cabinets.
Also, verify knife switch labeling. (Priority 3)
Status:
The as built verification is complete.
A review is being performed to determine if discrepancies exist between design drawings and as built conditions.
Work authorizations will be issued to correct any discrepancies.
The review and any discrepancies found will be corrected no later than the end of the pre-commercial outage (Unit 2) and the end'f the first refueling o'utage (Unit 1).
Action g3:
Replace fuses (if necessary)/change labels (for knife switches and fuses) as required.
(Priority 3)
Status:
Accessible fuses have been'nspected and replaced (where necessary).
Remaining fuses and labels will be inspected and/or replaced (if necessary) as equipment is made available but no later than the end of the pre-commercial outage (Unit 2) and the end of the first refueling outage (Unit 1).
Action //4:
Establish Fuse Control Policy. (Priority 3)
Status:
An operating instruction on how to remove and control fuses will be issued by September 10, 1984.
Action 85:
Determine proper Control Fuse size/type for:
13.8 breakers 4.16 breakers 480V Load Centers (not MCC's) (Priority 3)
Status:
Evaluation of proper control fuse size/type for breakers and load centers noted has been completed.
Action //9:
Revise appropriate procedures including COL's. (Priority 3)
Status:
4KV switchgear knife switches have been added to the appropriate COL's reflecting new labels.
13KV 6 480V knife switches will be added to appropriate COL's by September 10, 1984.
As labels are changed, revisions will be made to COL's on an ongoing basis.
Labeling will be completed by the end of the pre-commercial outage (Unit 2) and the first refueling outage (Unit 1).
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2.
Action Item No. 2-84-04-07
==
Description:==
Repair SCRAM discharge volume drain valve (2F011) operator.
Action N7:
Status:
Revise PM's for similar valves. (Priority 3)
A review of PM's was performed.
The only preventive maintenance activity performed on the scram discharge volume drain valves or other similar valves is periodic packing change out.
This is in agreement with vendor recommendations.
The problem with the 2F011 valve was determined to be caused by improper assembly of the stem coupling during initial installation or fabrication.
Unit 2 similar valves have been inspected.
No additional problems were identified as a result of this inspection.
Unit 1 similar valves will be inspected by the end of the first refueling outage.
As the failure was not related to a mechanism that could, through time or operation, repeat itself, there is no need for additional PM's.
Action //8:
Inspect similar valves for Unit 1. (Priority 3)
Status:
The similar valves on Unit 1 will be inspected by the end of the first refueling outage.
3.
Action Item No. 2-84-04-09
==
Description:==
Are D/G overvoltage trip procedural controls adequate?
Action k/4:
Status:
Action f/5:
Determine max T/D on Timing relay. (Priority 3)
This work has been completed.
n Recalibrate overvoltage relay (ratio of pickup to dropout-should be as low as possible).
(Priority 3)
Status:
Action 88:
This work has been completed.
Provide RSCN for relay settings as required. (Priority 3)
Status:
Testing is being performed to determine if a revised setting is practical.
Evaluation of the test results will be completed by September 7,
1984.
Action f/9:
Optimize O.V. protective scheme (long term fix).
(Priority 3)
Status:
The overvoltage relays presently installed on the diesel generators are frequency sensitive and tend to operate on diesel starts when voltage builds up faster than speed.
Misoperations of this relay have occurred for manual starts.
The existing relay and timer shall be replaced
with a nonfrequency dependent unit and a longer time delay unit.
This modification is being designed by engineering and will be installed when issued.
4.
Action Item No. 2-84-04-10
==
Description:==
Specify the indications available to detect a loss of Control and Trip D.C. Power to 13.8KV, 4KV Switchgear and 480V Load Center Breakers and a Loss of Auxiliary Relay and Control D.C. Power to the 13.8KV, 4KV Switchgear and 480V Load Centers.
Action i/4:
As a result of re-label; incorporate proper terminology into training procedures, etc. (Priority 3)
Status:
Training on switchgear components and indications, including the purpose and operation of each component will be developed and incorporated into the Requalification Training Program, the Auxiliary System Operator and Nuclear Plant Operators Training Programs.
Program development and training are to be completed by December 31, 1984.
Action i/5:
Evaluate changes to procedure as result of re-labeling (procedures~
instructions, guidelines).
(Priority 3)
Status:
Labeling changes will be incorporated into appropriate procedures as changes are made.
Labeling changes will be completed by the end of the pre-commercial outage (Unit 2) and the end of the first refueling outage (Unit 1).
Action //10:
Rectify labeling to prints. (Priority 3)
Status:
A procedure for labeling changes is being developed.
A requirement to incorporate changes made into appropriate drawings is a part of this procedure.
The procedure will be issued prior to the end of the pre-commercial outage (Unit 2).
5.
Action Item No. 2-84-04-12
==
Description:==
Explanation of partial full core display indications immediately after transient.
Action N5:
Evaluate and revise as required the ATWS procedure.
(Priority 3)
Status:
Evaluations have been initiated and will be completed by August 30, 1984.
Procedure revisions and training will be implemented by October 5, 1984.
Action //6:'eview the differences between Units 1 and 2 relative to the full core display during blackout conditions and make recommendations.
(Priority 3)'
lit
Status:
The review of the full core display differences has been performed.
Considerations based on this review will be evaluated.
6.
Action Item No. 2-84-04-13
==
Description:==
Evaluation of operation of SGTS during transient.
Action 82b:
Evaluate desirability of modifications for the SGTS based upon review of the trip experienced.
(Priority 3)
Status:
A review is being performed to determine the desirability of eliminating the low negative differential pressure trip.
Evaluations based on this review will be completed by December 1,
1984.
7.
Action Item No. 2-84-04-17
==
Description:==
Action //2:
Conduct operator training as a result of this event.
Define who (by position) get training (scope).
(Priority 4)
Status:
It was determined that on shift operators need to be trained on the events of this transient.
Action
$34:
Determine and provide additional training required for each group. (Priority 4)
Status:
On shift operators were trained on the events of this transient.
This training is completed.
1 Action 85:
Conduct training and incorporate lessons learned into training programs.
(Priority 3)
Status:
Training materials for lessons learned such as:
switchgear components and indications, full core display response to loss of power, and communications are being developed and will be incorporated in the Operator training program as a
Unit of Instruction by December 31, 1984.
8.
Action Item No. 2-84-04-19
==
Description:==
'eview 13.8KV and 4KV Bkr tagging requests to determine how often we apply tagging to those breakers.
Action 83:
Evaluate adequacy of written tag out direction (results may be changed to AD). (Priority 3)
Status:
The administrative procedures for Permit 6 Tag, System/Equipment
- Release, and Electrical and Mechanical Bypass Control will be revised by September 10, 1984, to state that "when switching is required the noun name
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written on the Red Tag (R/T), Yellow Tag (Y/T), Equipment Release Form (ERF) or Bypass (B/P) tag must be consistent with the breaker nomenclature.
9.
Action Item No. 2-84-04-20
==
Description:==
How can an operator get a remote emergency start of the D/G's from the control or relay room?
Action /f3:
Evaluate the necessity of D/G emergency start capability from the Control, Room other than by the methods currently available.
(Priority 3)
Status:
An industry review for typical diesel start logics is being performed.
Additional reviews are being performed to determine the feasibility for changing or providing emergency manual start capabilities and to determine if the addition of an emergency manual start would change the Probabilistic Risk Assessment (PRA).
Evaluations of reviews to be completed by November 27, 1984.
- 10. Action Item
==
Description:==
No. 2-84-04-21 D/G "A" was manually tripped immediately after its manual start due to large frequency oscillation.
Action f/5:
Review/evaluate Diesel Generator test program for adequacy for respect to determining Diesel Generator performance.
(Priority 3)
Status:
Performing a detailed review of current testing procedures.
The evaluation of this review is scheduled to be completed by December 31, 1984.
ll. Action Item No. 2-84-04-22
==
Description:==
Training Concerns Action
$/3:
Review Station Program for methods of assuring Non-Routine Training is performed.
(Priority 3)
Status:
The evaluation will consist of:
a review of existing procedures/instructions; interview of appropriate section/group supervision; and attending section/group non-routine training sessions.
Some aspects of the review are:
identify the nature/scope of the non-routine training; who determines the training to be presented; frequency of training; presentation methods; documentation of training and attendance; procedural definition of program; controls to assure personnel receive training prior to performing duties; scope of training, e.g.,
group specific and/or general plant.
The evaluation will be completed by November 16, 1984.
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- 12. Action Item No. 2-84-04-26
==
Description:==
Reg.
Guide 1.47.
Action 83:
Review and revise as appropriate monthly Surveillance Maintenance (SM) procedures to incorporate provisions for continuity checks on non-supervised circuits so as to assure full closure.
(Priority 4)
Status:
The following Unit 1 procedures have been reviewed and
,revised:
monthly 4KV Buses Degraded Voltage Functional Test (1A201) monthly 4KV Bus 1A202 Degraded Voltage Channel Functional Test monthly 4KV Bus 1A203 Degraded Voltage Channel Functional Test monthly 4KV Bus 1A204 Degraded Voltage Channel Functional Test The following Unit 2 procedures have been reviewed and revised:
monthly 4KV Bus Check.
monthly 4KV Bus Check.
monthly 4KV Bus Check.
monthly 4KV Bus Check.
2A201 Degraded Voltage Channel Functional 2A202 Degraded Voltage Channel Functional 2A203 Degraded Voltage Channel Functional 2A204 Degraded Voltage Channel Functional This completes the action to this item.
- 13. Action Item No. 2-84-04-27
==
Description:==
Suppression Pool Temperature Loss.
Action /f2:
Provide a description of how to reset (Priority 3).
Status:
A description of how to reset has been provided to operations.
Action f!3:
Revise ON-117 and 217 (Priority 3).
Status:
The Off-Normal Procedures for Loss of Instrument Bus have been revised to reference Operating Procedures, for the restart-of SPOTMOS if power is restored and reference Emergency Operating Procedures, (Response to Station Blackout) for alternate means of monitoring suppression pool temperature if power is not restored.
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- 14. Action Item No. 2-84-04-29
==
Description:==
Power Transfer Switches Action 81:
Listing of all Power Transfer Switches.
(Manual and Auto)
(Priority 3)
Status:
Incorporated into study on the effects of common electrical power source interruptions.
This study is scheduled for completion by November 1,
1984.
Action 82:
Determine present lineup of all Power Transfer Switches and how these are checked and controlled. (Priority 3)
Status:
The Power Transfer Switches are checked and controlled by Operating COL's.
A review of Power Transfer Switches will be completed by September 10, 1984, to assure they are included in appropriate COL's.
Action /33:
What is the desired lineup for maximum reliability7 (Priority 3)
Status:
Incorporated into study on the effects of common electrical power source interruptions.
This study is scheduled for completion by November 1,
1984.
Action f14:
Review labels versus OP's/Col's and revise accordingly.
(Priority 3)
Status:
A review of Power Transfer Switches to include appropriate labeling will be completed by September 10, 1984, to assure they are included in appropriate COL's.
- 15. Action Item No. 2-84-04-30
==
Description:==
Loss of AC Instrument Indication Action 81:
Does the present design provide adequate instrumentation during a loss of AC power.
Is'he present instrumentation of sufficient range and is it in accordance with the General Design Criterion? (Priority 3)
Status:
An engineering review is being performed to determine the basis and completeness of the instrumentation which remains operable during loss of AC as currently provided in plant procedures "Response to Station Blackout."
Also, an engineering assessment is, being performed to determine the adequacy of existing instrumentation from an operational viewpoint.
These reviews are scheduled for completion by September 14, 1984.
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Action i/2:
Perform an HFE Review of Instrumentation Locations for instruments used during a loss of AC power. (Priority 3)
Status:
An HFE revie~ will be conducted in conjunction with the engineering review addressed in Action 81 of this item.
This review is scheduled for completion by November 1,
1984.
Action /33:
Are there sufficient instruments available for the operating staff to properly perform their activities during loss of AC power? (Priority 3) a.
Are ranges proper?
b.
Are locations proper?
c.
Are there a sufficient number of instruments?
Status:
A review of instrumentation available during loss of AC power by operations personnel recommended that additional instruments be installed.
These should include wide range vessel pressure and level instruments on 1C601 and 2C601 and a reliable Full Core Display.
The recommendations will be evaluated with the results of the reviews identified in actions 1 and 2 of this item.
- 16. Action Item No. 2-84-04-31
==
Description:==
Independent Verification Action 81:
Review the Station Program for Independent Verification and provide recommendations (Common Mode Failure Considerations).
(Priority 3)
Status:
This review will identify:
current verification practices; the 'independence'f the verification process; how verifiers are selected/identified; and programmatic (procedures/instructions) and informal practices.
The review will be completed by October 31, 1984.
- 17. Action Item No. 2-84-04-32
==
Description:==
Review of standard electrical operating practices.
Action //1:
Review of standard electrical practices.
(Priority 3)
Status:
This review was conducted'oncurrent with the review of Action Item No. 2-84-04-10, Action 8, Action Item No.
2-84-04-19, Action 3, Action Item No. 2-84-04-05, Action 4, Action Item No. 2-84-04-29, Actions 2
& 4, Action Item No.
2-84-04-35, Action l.
Appropriate recommendations based upon the reviews of the action noted will be incorporated into standard electrical practices by December 31, 1984.
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Action //2:
Poll the operators for review of standard electrical operating practices.
(Priority 3)
Status:
Operators will be interviewed to determine the nature and scope of electrical operating practices.
In-plant observations will be made where appropriate.
Operations supervisory personnel will also be interviewed to determine their concept of standard electrical operating practices.
Documented practices within procedures and/or instructions will also be reviewed, as well as associated formal/informal training.
The review will be completed by October 26, 1984.
- 18. Action Item No. 2-84-04-34
==
Description:==
Staffing.
Action //1:
Given the type of event, was our Operating Staff adequate?
(2 Units worst case)
(Priority 3)
Status:
A review was conducted and the existing Susq.,
SES Operating staff is adequate to operate the station during a transient of this nature.
- 19. Action Item No. 2-84-04-35
==
Description:==
Procedure Review:
- 480V, 4KV & 13.8KV, 250VDC, 125VDC, and Diesel Generator cubicles.
Action k/1:
Review for adequacy SM's, PM's, OP's, and SO's that enter
- 480V, 4KV, 13.8KV L.C.,
- 250VDC, 125VDC, and Diesel Generator cubicles.
(Priority 3)
Status:
A review of PMs,
- OPs,
& SOs that enter switchgear will be performed to determine if adequate detail exists.
The review will be completed by December 31, 1984.
Action //2:
Review for adequate control, PM's that enter
- 480V, 4KV, 13.8KV L.C.,
- 250VDC, 125VDC, and Diesel Generator cubicles.
(Priority 3)
Status:
An equipment release form/blocking review will be performed on the maintenance department's Preventive Maintenance activities that request electrical blocking to add specific blocking for the DC breaker control power knife switch when requesting a breaker to be racked out of its cubicle.
The DC knife switch will be tagged open.
A review of requested electrical blocking to assure compliance with the System/Equipment Release administrative procedure will be performed prior to submitting the Preventive Maintenance Work Authorizations for release.
The PM's will be reviewed prior to implementation but no later than December 31, 1985.
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10 SM's will be reviewed by December 31, 1984 to assure adequate detail exists.
Action
$/3:
Review for adequate control, ST's that enter 480V, 4KV, 13;8KV L.C.,
- 250VDC, 125VDC, and Diesel Generator cubicles.
(Priority 3)
Status:
Startup and Hot Functional Tests scheduled to be run during the remaining portion of the Startup Test Program will be reviewed prior to being released by the S&T Group to ensure that adequate controls are established within the procedure whenever 480V, 4KV, 13.8KV,
- 250VDC, 125VDC or Diesel Generator cubicles or other control circuits are entered for the purpose of creating an interruption or disturbance.
All reviews and corrective actions shall be completed by September 20, 1984.
- 20. Action Item No. 2-84-04-37
==
Description:==
Recorder Pen Colors Discrepancy between Unit 1 and 2 HFE Post Accident Inst. Levels, Pressure.
Action //1:
Resolve recorder pen color differences in Control Room Recorders identified during event. (Priority 3)
Status:
A plant modification has been proposed to resolve pen color discrepancies for Rx Level and Rx Pressure Recorders.
The modification is scheduled for completion by June 30, 1985.
- 21. Action Item No. 2-84-04-39
==
Description:==
Pre-Test Walk-Through Action //1:
Test Director to walk through with Operations and involved primary groups which have an active role prior to major tests.
(Priority 4)
Status:
A Pre-Test Walk-Through was performed prior to performing Startup Test ST31.1 on August 7,
- 1984, and will be performed prior to performing each of the major tests remaining in the Startup Test Program.
The final major test of the Startup Test Program is currently scheduled for October 27, 1984.
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