ML11243A061
| ML11243A061 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/24/2010 |
| From: | - No Known Affiliation |
| To: | Office of Information Services |
| References | |
| FOIA/PA-2011-0157 | |
| Download: ML11243A061 (9) | |
Text
Unit 3 System Status: NF,4
- .FA.*:
- T.-;
User Status:
CFTD *TA Notification:
NN 200983136 I
==
Description:==
Excessive -!il Lubricator Discharge Created on: 06/24/2010 Reported By: i(b)(6)
Responsible:
Priority:
Required Start: 06/24/2010 06:58 End:
Order No: 800534218 Code:
Task Exists?
[Y]
Func.Loc.: S3.EDGS.S32420MW707 16 CYLINDER ENGINE LEFT BANK LUBRICATOR Equipment:
Assembly:
Quality Class: II Location:
DG Room:
Elevation: 030 Column:
Planner Group: Maint Machinist WorkCenter: MM Maint Mechanical Plant: 1000 SONGS - Services Reliability Classification: CRITICAL-B ARC Review Status: A Awaiting review Feedback Req'd?
[j M Rule:
Sig Level:
Breakdown
[I Malfunction Start: 06/24/2010 09:18 Breakdown Duration:
H End:
==
Description:==
06/24/2010 06:58:31 :(b)(6)
Phon [(b)(6)
/
- 1.
Problem description
/ Excessive EDG starting air lubricating oil was deposited below the iett bank starting motor exhaust elbows on the 16 cylinder (ENGINE1).
/
/2.
Impact or consequence
/ Excessive oil discharge will deplete the oil stored in the lubricator for future engine 1 left bank air start demands.
/
/ 3. Describe what happened
/ During the surveillance start of the Unit 3 EDG B engine 1 excessive oil from the lubricator was discharge through the left bank air start motors on to the engine base frame. While it is normal to see a light grayish mist residue following an engine start, the quantity seen deposited was larger in deposition area and heavily puddled liquid in character.
/ 4. Immediate actions taken
/ The ex:ccessive discharge was brought to the attention of the duty operator who promptly cleaned it up.
Informed control room personnel and requested that the duty operator at Print Date: 0/,125/2010 Pdge 1 of 9
Notification Continued Notification:
NN 200983136
==
Description:==
EOcesije (il Lubricator Discharge Description Continued:
the diesel write up a brief description of what he saw.
/
/ 5. Cause (if known)
/
/ 6. Recommended Actions
/ Check level in the lubricator.
/ Add oil.
/ Troubleshoot to determine cause of excessive oil usage.
/
Print Date: 06/25/2010 Page 2 of 9 Print Date: 06/25/2010 Page 2 of 9
Task Summary Notification:
NN 200983136 Func.Loc. : S3.EDGS -.S24ZN[,W707 16 CYLINDER ENGINE LEFT BANK LUERICATO.R Location:
DG Room:
Elevation:030 Column:
Sort No.:
0001 Code Group:N-TS-IOD Short Text:
Task Code: N030 WorkCenter:
Responsible:
Code Group:N-POD Short Text:
Task Code: P010 WorkCenter:
Responsible:
Immediate Operability Determination IOD-Equipment OPERABLE Prompt Operability Determination POD Created Sort No.:
0002 Print Date: 06/25/2010 Page 2 of S Print Date: 06/25i2010 Page 3 of 9
Trending Worksheet Notification:
NN 200983136 Func.Loc.: S3.EDGS.S32420MW707 16 CYLINDER ENGINE LEFT BANK LUBRICATOR Part:
Damage:
Cause:
Activity:
Part:
Damage:
Cause:
Activity:
Part:
Damage:
Cause:
Activity:
Part:
Damage:
Cause:
Activity:
Print Date~ O6/25/201C Page 4 of 9 Print Date: 06/25/2010 Page 4 of 9
Task Details Notification:
NN 200983136 Func.Loc. : 53.EDGSS32420MW7',7 16 CYLINDEF. ENGINE LEFT BANK LUBRICATOR Location:
DG Room:
Elevation:030 Column:
Task npt41g-Sort No.:
0001 Code Group: N-TS-IOD Immediate Operability Determination Short Text:
Task Code: NO30 IOD-Equipment OPERABLE WorkCenter:
Responsible:
Status:
TSRL Planned Start:
Planned End:
Complete:
Task Long Text:
NOTES:
- 1) Parts 1 through 4 will be completed by the STA.
- 2) Part 5 may be completed by Operations (STA) or Engineering (Responsible Engineer) when the SSC has been restored to a fully qualified status. IOD (Immediate Operability Determination)
This is an Immediate Operability Determination (IOD).
- 1. Deficiency Identified and the Affected Functional Location:
- 2.
Identify the Specified Safety Function(s); include mission time (if applicable):
The EDG 3G003 provides emergency onsite 4 kV power to the train B 1E 4 kV Bus 3A06 during loss of offsite power events.
It can also provide the same to the 2A06 Bus utilizing the EDG cross-tie EOI instructions when required.
EDG 3G003 is required Operable per Tech Spec 3.8.1 in Modes 1-4. The EDG has a mission time of 7 days without operator actions.
Each diesel engine (two engines per generator) is equipped with four air starting motors.
Each air starting system supplies air to two air starting motors on each engine, a total of four air starting motors.
When rhe diesel generator set receives a start signal, all four solenoid valves are energized Print Date: 06/25/2010 Page 5 of 9
Task Details Continued Notification:
NN 200983136
==
Description:==
E:zi;v Oil Lubricater Discharge simultaneously, accivatino all eight air starting motors and using air from both air start systems independently.
- Thus, if one air start system fails Lo operate, the second will start the diesel generator set without having to wait for a second start attempt and switching from the first air start system to the second.
UFSAR section 9.5.6 3.
Conclusion:
Determine OPEPABLE'INOPERABLE x
Operable Inoperable Basis (provide discussion)
The EDG remains Operable because the excessive oil discharge does not affect the ability of the EDG to perform ito safety function. A ccndition of no oil discharge would degrade the air start motor to the uuijiL wh1CtL it would £dil. The excessive oil disihaiye will deple-t Lhe level in the oil reservoir. The oil level has been refilled to maximum by adding approximately.1 gallon to a.5 gallon reservoir to support subsequent starts.
It is not feasible to determine if the oil discharge rate will deplete the reservoir prior to the next scheduled fill (approximately every 2 years) however the air start motor will not fail immediately with no oil discharge and will run for the required 5 start attempts but would be a long term degradation. This discharge is checked on every scheduled start and a lack of oil discharge would be observed and resolved.
- 4.
Extent of Condition NOTE: Address the question: "Does the degraded or nonconforming condition currently exist on the other train/unit?"
a, Has an EOC Task been created to address the extent of condition (YES or NO)?
b)
If no EOC Task has been created, describe "ocher train/other unit" findings (if performedi or indicate N/A (if not necessary) N/A Print Date: 06/25/2010 Pdye 6 of 9 Print Date: 06/2S/2010 Pdge 6 Uf 9
Task Details Continued
>.,)I PS4 Notification:
NN 200983136
==
Description:==
E:*xcesive Cil Lubricator Discharge
- 5.
IOD Closure Information Reviewed and approved b(b)(6)y 6/24/10 Print Date: 0E/2S/2010 Page 7 of L
Print Date: 06/25/2010 Page 7 of 9
Task Details NC IN(. N Notification:
NN 200983136 Func.Loc. : S.3.z :*4*.*
- 4MW707 16 CYLINDER ENGINE LEFT BAIW. LUBtIC'ATCR Location: DG Room:
Elevation:030 Column:
Sankr N)o.ail:
Sort No. :
0002 Code Group: N-POD Short Text:
Task Code: P010 WorkCenter:
Responsible:
Status:
TSRL Planned Start:
Planned End:
Complete:
Prompt Operability Determination POD Created Task Long Text:
PROMPT OPERABILITY DETERMINATION TEMPLATE (Refer to S0123-XV-52)
PART 1: DEGRADED/'NONCONFORMING/UNANALYZED CONDITION A. Describe the as-found condition and the equipment affected, assuring that the problem and scope have been clearly identified.
B.
If it is confirmed at this stage that no degraded, nonconforming or unanalyzed condition exists, record as such and provide justification.
PART 2: SPECIFIED SAFETY FUNCTION(S)
OF THE AFFECTED SSC PART 3: BASIS FOR DETERMINING IMPACT ON SPECIFIED SAFETY FUNCTION(S)
A. Technical Basis B.
Status (As Found)
Specified Safety Function(s) Satisfied Specified Safety Function(s) NOT Satisfied PART 4: CONTINUED DEGRADATION PART 5: COMPENSAT'.)F.
MEASURES NiA Included (describe)
Print Date:
Page 8 of 9 Print Date: G9...'2SZClO Page 8 of 9
Task Details Continued Notification:
NN 200983136
==
Description:==
E0cessive Oil Lubricator Disc:harge PART 6: EXTENT OF CONDITION (Reauired for Inooerable)
EOC Created (YES or NO)?
Describe "other train/other unit" findings (if performed):
Print Date: Q6i--,S/2010 Page 9 of 9 Print Date: OG/:2E/2010 Page 9 at 9