| |
|||
| Index | Site Map | FAQ | Facility Info | Reading Rm | New | Help | Glossary | Contact Us | |
||
ACCESSION #: 9809030048
Ajax**(Registered trademark]
Coberra**[Registered trademark]
Cooper-Bessemer**[Registered trademark]
ENOX**[Trademark]
Enterprise**[Trademark]
En-Tronic**[Registered trademark]
Penn**[Trademark]
Superior**[Registered trademark]
COOPER ENERGY SERVICES
August 28, 1998
| Our Ref: | QCG-10505 File No. K-5fa44 |
| Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555 | |
| Subject: | 10 CFR 21 Notification, Enterprise DSR-4 and DSRV-4 Emergency Diesel Generator Starting Air Pressure Switch |
Dear Sir
In accordance with the requirements of the Nuclear Regulatory Commission Title 10, Chapter 1, Code of Federal Regulations, Part 21, Cooper Energy Services (CES), a division of Cooper Cameron Corporation, hereby notifies the Commission of a potential design anomaly of the Enterprise**[Copyright] DSR-4 and DSRV-4 Emergency Diesel Generators (EDG's).
The subject anomaly is related to the deactivation of non-essential safety shutdowns while the EDG, is in the emergency mode.
The attached drawing is a typical start circuit for all Enterprise Standby Diesel Generator units. There are two start circuits per control system, Circuit A and Circuit B. Some sites may only have one starting air pressure switch in each circuit. The attached drawing will show the more typical two pressure switches (PS-38 and PS-4B) in one circuit.
| 1. | Pressure Switch PS-40B, line 120. Opens when the system is in Maintenance Lockout Mode. |
| 2. | Pressure Switches PS-3B and PS-4B, lines 120 and 121. Opens when the starting air pressure is below the low-pressure level setting (typically 150 psi). |
| 3. | Remove Contacts, lines 119 and 120. Close for a remote emergency start. |
| 4. | Pressure Switch PS-45B, line 121. Close for a local emergency start. |
| 5. | Relay Contact R4B-1, line 121. Opens on a normal start signal. |
| 6. | Pressure Switch PS-33B1, line 118. Open when the diesel engine reaches 200 RPM. |
| 7. | Deactivate Shutdown Solenoid Valve 502-2B, line 120. Energize to lockout all non-essential shutdowns. |
| 8. | Starting Air Solenoid Valves Sol. 1B and Sol. 2B, Lines 118 and 119. Energize to supply, starting air to the diesel engine. |
| 1. | The control system is not in Maintenance Lockout Mode so pressure switch PS-40B is closed. |
| 2. | The Starting Air Receivers pressures are greater than item 2 above so both pressure switches PS-3B and PS-4B are closed. |
| 3. | The control circuit receives an emergency start signal (local or remote). All three solenoid valves will energize. |
| 4. | The Deactivate Shutdown solenoid valve will lockout all non-essential shutdown signals to the shutdown circuit. |
| 5. | The Starting Air solenoid valves will allow cranking of the diesel engine with starting air pressure. |
| 6. | When the diesel engine speed is greater than 200 RPM, the pressure switch PS-33B1 will open de-energizing the Starting Air solenoid valves. |
The function of the starting air pressure switches (PS-3B & 4B) is to de-energize the starting air solenoid valves on the condition that the Standby Diesel Generator does not start with an emergency start signal. The pressure switches are set for a low pressure limit (typically 150 psi falling) to ensure a sufficient volume of air in the starting air receivers to allow the operator to have more than two additional manual starts, When the Standby Diesel Generator is running in an emergency mode and a non-essential Pneumatic shutdown sensor trips, starting air pressure is vented from the system. At the low limit setting the starting air pressure switches will open, deenergizing the Deactivate Shutdown solenoid valve. With the solenoid valve de-energized, the shutdown circuit will recognize any nonessential shutdown signal resulting in a shutdown of the Standby Diesel Generator.
All Enterprise EDG's except those at Plant Vogtle
To correct this condition the pressure switches need to be rewired to a different location. The new location as noted on the attached drawing would allow the Starting Air solenoid valves to be de-energized and the. Deactivate Shutdown solenoid valve would remain energized.
If the plant site circuit is different than the attached drawing, please call Cooper Energy Services for assistance.
It should be noted that the subject corrective action was presented to affected plant representatives and discussed at the July 1998 Cooper Enterprise Clearinghouse meeting.
If you have any questions concerning this report, please contact T. L. Miller, Quality Engineering at 724-458-3448 or Ronald G. Billig, Manager, Technical Services at 724-458-3584.
| Sincerely,
COOPER CORPORATION Peter DeFronzo |
Page 3
August 28, 1998
QCG-10505
| cc: | J. M. Horne - CES/GC |
| B. C. Guntrum - CES/Alameda | |
| R. G. Billig - CES/GC | |
| R. A. Johnston - CES/Alameda | |
| L. A. Duck - CES/Alameda | |
| S. R. Johnston - CES/Alameda | |
| S. A. Chubbuck - CES/Alameda | |
| File: K5fa44 |
Page 4
August 28, 1998
QCG-10505
Copies to:
Mr. Stephen Alexander
U.S. Nuclear Regulatory Commission
QA Vendor Insp. & Maintenance Branch
One White Flint North
Mailstop 9A1
Washington, DC 20555
Carolina Power and Light Co.
Harris Nuclear Project
P. O. Box 165
New Hill, NC 27562
Attn: William Robinson, Vice President
Carolina Power and Light Co.
P. O. Box 1551
Raleigh, NC 27602
Attn: Manager Nuclear Licensing
Carolina Power and Light Co.
Department Manager
Harris Nuclear Plant
P. O. Box 165, State Road 1134
New Hill, NC 27562
Cleveland Electric Illuminating
Perry Nuclear Power Plant
P. O. Box 97
Perry, OH 44081
Attn: Manager, Quality Control
Cleveland Electric Illuminating
Perry Nuclear Power Plant
P. O. Box 97
Perry, OH 44081
Attn: Harold M. Coon
Cooper-Enterprise Clearinghouse
Duke Engineering & Service
215 Shuman Blvd., Suite 172
Naperville, IL 60563
Attn: Mr. Ted Bronson
Duke Power Co.
Nuclear Generation Dept.
P. O. Box 1006
Charlotte, NC 28201-1006
Attn: Mgr., Nuclear Safety
ECO59
Duke Energy Corp.
OEA Manager
Nuclear Assessment Division
Mail Code FC 05P
Box 1006
Charlotte, NC 28201-1006
Entergy
P. O. Box 429
Echelon One
1340 Echelon Parkway
Jackson, MS 39286-1995
Attn: F. W. Titus (Fred), Vice President, Engineering
Entergy
P. O. Box 756
Port Gibson, MS 39150
Attn: C. R. Hutchinson (Randy), Vice Pres., Operations-GGNS
Entergy
P.O. Box 756
Port Gibson, MS 39150
Attn: D. L. Pace, Director, Design Engineering-GGNS
Entergy
P. O. Box 756
Port Gibson, MS 39150
Attn: M. J. Meisner, Director, NS&RA
Manager, Quality Services
Entergy Operations
Box 756
Port Gibson, MS 39150
Southern Nuclear Operating Company
Vogtle Project
P. O. Box 1295
Birmingham, AL 35201
Attn: Mgr., Nuclear Engineering and Licensing
Georgia Power Co.
Plant Vogtle
P. O. Box 1600
Waynesboro, GA 30830
Attn: Mr. W. B. Shipman, General Manager
Page 5
August 28, 1998
QCG-10505
Entergy Riverband
P. O. Box 220
St. Francisville, LA 70775
Attn: L. A. England, Director Nuclear Licensing
Long Island Power Authority
Corporate Quality Assurance
140 Hoffman Lane
Centril Islip, NY 11722
Attn: Mr. Joseph Gilliard
Operating Experience Manager
Tennessee Valley Authority
1101 Market Street, LP 4A-C
Chattanooga, TN 37402
TU Electric Company
P. O. Box 1002
Glen Rose, TX 76043
Attn: Group Vice President - Nuclear
Washington Public Power Supply
P. O. Box 460
Richland, WA 99352
Attn: Mr. L. C. Oakes, Manager, WNP-1 Engineer
T. R. Ho, Superintendent
Taiwan Power Company
Kuosheng Nuclear Power Station
60 Pa-Tou Yeh-Liu Village
Wan Li Hsiang, Taipei Hsien
(20703), Taiwan, R.O.C.
Mr. S. J. Tsuei
Director, Nuclear Safety Dept.
Taiwan Power Company
242 Roosevelt Road, Sec. 3
Taipei, Republic of China
Mr. S. H. Soong
Station Superintendent
Third Nuclear Power Station
Taiwan Power Company
P.O. Box 39
Heng-Chun, Ping-Tung Hsein
Taiwan, 924 R.O.C.
Mr. Koh, Kyoo-Kun
Plant Manger, Kori 3 & 4
Korea Electric Power Corp.
216 Ko-Ri Jangan-Up
Yangsan-Gun
Kyung-Nam, Korea 626-950
Mr. Hong, Jo Boo
Manager, Nuclear Power Generation Dept.
Korea Electric Power Corp.
167, Samsong-Dong, Kangnam KU
Seoul, 135-791 Korea
Mr. Lee, Hee-Sung
Plant Manager, Yonggwang Nuclear Unit 1 * 2
Korea Electric Power Corp.
517, Kyema-Ri Hong Nong-Eup
Yonggwang-Gun Jeon Nam
Korea 513-880
| GENERAL INFORMATION or OTHER | EVENT NUMBER: | 34708 | |||
| LICENSEE: | COOPER ENERGY SERVICES | REGION: | 1 | NOTIFICATION DATE: | 08/28/98 |
| NOTIFICATION TIME: | 15:43 [ET] | ||||
| CITY: | GROVE CITY | STATE: | PA | EVENT DATE: | 08/28/98 |
| COUNTY: | AGREEMENT: | N | EVENT TIME: | 00:00[EDT] | |
| LICENSE#: | LAST UPDATE DATE: | 08/28/98 | |||
| DOCKET: | |||||
| NOTIFICATIONS | |||||
| NRC NOTIFIED BY: | RONALD G. BILLIG | WILLIAM COOK | RDO | ||
| HQ OPS OFFICER: | BOB STRANSKY | LEN WERT | R2DO | ||
| EMERGENCY CLASS: | NOT APPLICABLE | PATRICK HILAND | R3DO | ||
| 10 CFR SECTION: | CCCC 21.21 | DALE POWERS | R4DO | ||
| UNSPECIFIED PARAGRAPH | VERN HODGE (FAX) | NRR | |||
EVENT TEXT
10 CFR PART 21 REPORT REGARDING ENTERPRISE DSR-4 AND DSRV-4 EMERGENCY DIESEL GENERATOR STARTING AIR PRESSURE SWITCHES
"THE FUNCTION OF THE STARTING AIR PRESSURE SWITCHES (PS-3B & 4B) IS TO DE-ENERGIZE THE STARTING AIR SOLENOID VALVES ON THE CONDITION THAT THE STANDBY DIESEL GENERATOR DOES NOT START WITH AN EMERGENCY START SIGNAL. THE PRESSURE SWITCHES ARE SET FOR A LOW PRESSURE LIMIT (TYPICALLY 150 PSI FALLING) TO ENSURE A SUFFICIENT VOLUME OF AIR IN THE STARTING AIR RECEIVERS TO ALLOW THE OPERATOR TO HAVE MORE THAN TWO ADDITIONAL MANUAL STARTS. WHEN THE STANDBY DIESEL GENERATOR IS RUNNING IN AN EMERGENCY MODE AND A NON-ESSENTIAL PNEUMATIC SHUTDOWN SENSOR TRIPS, STARTING AIR PRESSURE IS VENTED FROM THE SYSTEM. AT THE LOW LIMIT SETTING THE STARTING AIR PRESSURE SWITCHES WILL OPEN, DEENERGIZING THE DEACTIVATE SHUTDOWN SOLENOID VALVE. WITH THE SOLENOID VALVE DE-ENERGIZED, THE SHUTDOWN CIRCUIT WILL RECOGNIZE ANY NON-ESSENTIAL SHUTDOWN SIGNAL RESULTING IN A SHUTDOWN OF THE STANDBY DIESEL GENERATOR.
"TO CORRECT THIS CONDITION THE PRESSURE SWITCHES NEED TO BE REWIRED TO A DIFFERENT LOCATION."
AFFECTED UTILITIES: ALL ENTERPRISE EDGs EXCEPT THOSE AT PLANT VOGTLE.