ML20128B249

Part 21 Rept Re Diesel Generator Overspeed Trip Allegedly Due to Mechanical Binding Linkage.Instruction Manual Requires Check of Operation & Calibr of Control & Shutdown Devices.Item Not Reportable Under 10CFR21

ML20128B249
Person / Time
Site:	Palo Verde
Issue date:	05/13/1985
From:	Bemiller C COOPER BESSEMER CORP.
To:	Baer R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
REF-PT21-85, REF-PT21-85-236-000 FER-5098, PT21-85-236, PT21-85-236-000, NUDOCS 8505240457
Download: ML20128B249 (2)

Text

-

COOPER BESSEMER RECIPROCATING

%*f2

- May 13, 1985 Mr. Robert L. Baer, Chief Engineering and Generic Connunications Branch Division of Bnergency Preparedness and Engineering Response Office of Inspection and Enforcement United States Nuclear Regulatory Comission Washington, D.C.

20555

Reference:

FER-5098

Subject:

Arizona Public Service, Palo Verde Station KSV-16 SN-7183-8 Diesel Generator Units Overspeed Trip Due To Binding Linkage Your Istter of 3-14-85

Dear Mr. Baer:

The referenced mechanical binding, which was alleged to be the ulti-mate cause of the overspeed governor shutdown trip, is not a generic problem. 'Ihe basis of judgment being used for normal cleanliness and maintenance lubrication for any moving part should be part of owning and being responsible for running an engine in this or any service.

The subsequent issuance of a Preventive Maintenance Task instruction regarding these points at issue indicates that it was an oversight originally on the part of the owner.

- The KSV Diesel Generator Instruction Manual supplied by Cooper-Bessemer does specify in Paragraph #14, Page 15-2, in the RELIABILITY CHECKING AND MADEENANCE INSPECTION section of the manual, that the operation and calibration of all control and safety shutdown devices be checked.

Our previous contact with Mr. J. C. Stewart verbally stated that we do not feel this a reportable item under 10CFR21.

Very y yours,/

Clif o C. Bemiller, Senior Field Engineer, P.E.

Reciprocating Field Engineering Department

/mle Copy w/att.: Mr. J. C. Stewart United States Nuclear Regulatory Comission Atta h ts 8505240457 850513 '

PDR ADOCK 05000528 uncoln Avenue 8

PDRt Grove City, Pennsylvania 16127 -

(412)458-8000 Telex: 86-6613

(

INTEGRAL ENGINE COMPRESSORS

• MOTOR-DRIVEN COMPRESSORS

• POWER ENGINES I

k Page 15-2 RELIABILITY CHECKING AND MAINTENANCE INSPECTION 1

Coxuparison with previous analyses will

1. With engine running loaded and up to oper-indicate change in engine condition that would ating temperatures, and by using an "en-

- lead to the rate of deterioration of the oil.

gine analyzer" record pressure / time, compression pressure and vibration dia-Pre-Periodic Test - Once Per Month Only grams for each power cylinder (photo-

1. Verify mnmini operation of cirenleH_n!

graphically record results). Hun should Inbe oil pump by turning switch on local not be less than four hour's continuous panel to " START" position and noting oil loaded. operation. Analyze records for pressure is maintained. Record pres-possible "=-">l running conditions and sures from indicator just downstream of take appropriate corrective action.

the pump. Pressure should be approxi-

2. Make a vibration survey of the diesel gen-mately 50 psi. Return switch to " AUTO /

erator 'ndng test run. Compare with STOP" position after test. If oil pressure previously recorded data.

is low check operation of pump and motor.

3. After stopping engine w'ait 15 minutes and

2. Verify mnmini operation of cir""ladng remove crankcase doors on one side of water pump and heater by tnWng switches angina. Check bearing temperatures for on local panel to " START". Record pres-excessive heat by holding hand near the sure and temperature at indicators dowrt-haen.

stream of the pump and heater. Water 4.

Measure and record hot and cold crank-pressure should be 17 psi and temperature shaft web deflection. Ensure all founda-should be between 120 and 130*F. If tion bolts in engine and generator are l

pressure or temperature is low, repair correctly tightened before maldnr any or replace heater and/or pump or con-measurements.

trols.

5 Measure and record main and rod bear-

3. Verify mann=1 operation of fuel oil booster ing. clearances (by jacking method).

pump by moving switch on local control 6~. Remove fuel injection nozzles and check panel to " START". Record. fuel pressure openingpressure and spray pattern.

at indicator downstream of the fuel filters.

7.. Borescope inspect all power cylinder l

~

Pressure must be above 25 pet. Check liners.

operation of pump, filters and strainers 8 Inspect the.following inside the crankcase.

if pressure is low. Refer to Trouble-a Cylinder liners for scuffing and expan-shooting Sectica.

sion sealat bottom of liner for water leaks.

Post Periodic Test -Once Per Month Only

b. Piston skirts forwear.

i

1. Verify that circulation pump starts as

c. AILbolts and nut locking devices, engine speed falls below 280 rpm with

9. Replace fuel oil filter elements and clean pump switch in the " AUTO /SIOP" post-strainers if pressure drop indicates this

)

tion 11 pump does not start check control necessary.

switch.

10 Checklube oli system full flow filter and 2.

Checkoillevelin overspeed governor 'If strainer for dirt and metal particles by a level is law refer to literature in the

,visualinspection.

Aniff=Mes to add oil.

11 Replace elements in filter 11 required and

3. Checkfor signs of externalwater, oiland clean strainer element.

airleaks.

12 Crankcase breather air filters must be chack=d and cleaned as necessary.

Check and clean individual breathers in Annual Insoection each cylinderhead cover.

An unmini inspection'should follow a

13. Inspect rocker arm assemblies (without

" Monthly / Periodic Test", therefore, com-disassembly).

plete allitems under the previous five head-

14. Check operation and calibration of all con-ings. In addition the following procedures trol and safety shutdown devices. Inspect should be carried out, tubing for any damage or leakage.

15TT-12/78

.u

.x

?*'

/pn sto

'o UNITED STATES

.!V

• ,,c NUCLEAR REGULATORY COMMISSION 5, y j

WASHINGTON. D. C. 20555 r aj gap I a.:q:

'b /

W.P y)

'Mr. Cliff Semiller y

c Cooper Bessemer. Corporation Lincoln Avenue.

Grove City, Pennsylvania 16127 Dear Mr. Beniller

SUBJECT:

OVERSPEED TRIP DUE TO BIhDING LINKAGE During startup testing of the Palo Verde Unit 1 on August 31, 1984 a Cooper Energy emergency. diesel generator (#1MDGAH01) tripped out on overspeed.

The trip was attributed by Palo Verde to mechanical binding between the fuel

-inje'ction pump control shaft'and the encircling handle causing the fuel control mechanism.to stick in the open position resulting in uncontrolled diesel speed.

Examination of.the control mechanism by Palo Verde defined the cause of the mechanical binding to be moisture and dirt contamination combined with a lack of proper lubrication.- Palo Verde subsequently issued a Preventive fiaintenance-Task which ensures proper quarterly service.

According to the Region V NRC inspectors, the Cooper Energy technical manual does not specify lubrication for the linkage that caused.the problem at Palo-Verde..The NRC considers this a potentially generic issue since other Cooper Energy diesel generators at nuclear power plants may be affected..

We request that you review this concern.

If you ' determine from your investi-gation that the technical manual does contain adequate lubrication information,

- please forward a copy of the applicable section for our review.

If your

~ investigation determines that the technical manual does not provide adequate-

lubrication instruction, please inform us ~of the nuclear power plants which may

.be affected and your corrective action, if any.

You are reminded to evaluate this concern under the requirements of 10CFR21.

For your information, Palo Verde'has not reported this as a 10CFR21 or a 10CFR50.55(e) item.

J'

f. & 1

?

Rd6ert L. B er, Chief Engineering and Generic Communications Branch Division of Emergency Preparedness and Engineering Response Office of Inspection and Enforcement Technical

Contact:

J. C. Stewart, IE (301) 492-9061 cc:

See'page 2

_oe-dm n L r m th 2 O (3 w y n }.a " r-

s n

l", ?

Itii il 1.* 1985 t

Mr. Cliff Bemiller.

-2

~

H. A.-Bailey,lIE.

cc:

- J. M. Taylor, IE-R. H.-Vollmer,-IE-

E. L. Jordan,-IE S.~A. Schwartz, IE

~

C. ; E.-.Rossi, :IE -

G.;G..Zech,s.IE D. ' F.- Kirsch, RI

-- J. C.-Stewart, IE Rl.L. Baer,cIE-

~A.;W. Dromerick, IE~

V.:D. Thomas, IE-

^

v e-M 9

g d

k m