ML20040B977
| ML20040B977 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 12/11/1981 |
| From: | Sniezek J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | Hanauer S Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20040B972 | List: |
| References | |
| REF-SSINS-9143, REF-SSINS-SSINS-9 NUDOCS 8201270124 | |
| Download: ML20040B977 (2) | |
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o, UNITED STATES
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NUCl. EAR REGULATORY COMMISSION h;E hl 5
WASHINGTON, D. C. 20555 DEC 111981 M
b Stephen H. Hanauer, Director, Division o f f H W y h Cf7-GE. ep./A-MEMORANDUM FOR:
Safety Technology, NRR a+.
FROM:
James H. Sniezek, Director, Division of Resident and egional Reactor Inspection, IE
SUBJECT:
LUBRICATING OIL FOR EMERGENCY DIESEL GENERATORS N
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During 1980, the Office of Inspection and Enforcement found that some licensees were not storing adequate quantities of diesel generator lubricating oil to assure that the diesel-generators could-operate for extended periods of time (approximately one week) without obtaining additional supplies. As a result, IE Circular 80-05 was issued (see Enclosure 1).
Paragraph 5 of that circular recommends that an inventory of lubricating oil be provided, "... consistent with the highest usage emergency diesel-generator (s) operating for the time period specified in plant Technical Specifications for fuel oil supply."
At least one licensee, however, has taken on the position that he must provide a sufficient inventory of lubricating oil for only one, not both diesel-generators (see Enclosure 2). ~~IE Headquarters believes the licensees position is not consistent with the intent of the standard technical specifications and the Standard Review Plan (SRP). Section 9.5.4 of the SRP, " Emergency Diesel Engine Fuel Oil Storage and Transfer System," explicitly covers fuel oil inventory requirements.Section III.6.b requires a " minimum onsite inventory of fuel oil for each redundant diesel generator sufficient...for a period of seven days..." (emphasis added).
IE recommends that the inventory of lubricating to permit operation of each diesel generator for the same period be required.
(Essentially the same as the recomendation of IE Circular 80-05).
Since an on-site inven' tory of lubricating oil inventory is not explicitly required by either the plant license or technical specifications, it is not clear that such a requirement is enforceable. Therefore, we recommend that the standard technical specifications be revised to include requireme'nts
_for lubricatina oil as well as fuel.
Specifically, we propose the revisions of Sections 3.8.11 and 4.8.1.1.2 shown in Enclosure 3.
We have notified RII that we concur with their position on lubricating oil '
supply at St. Lucie.
Since no new position or interpretation is expressed, the matter is not being referred to the CRGR.
CONTACT:
R. L. Baer, IE 49-24780 9201270124 020107 PDR REVGP NRCCR
DEC 11 DOI Stephen H. Hanauer 2.
Mr. Brinkman of your staff and Mr. Baer of my staff have briefly discussed this matter.
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'niezek, Director Divi:
- n of Resident and Regional Reictor Inspection' Office of, Inspection a.nd Enforcement
Enclosures:
1.
IE Circular 80-05 dtd 4/1/80 2.
Memo, Kellogg to Sniezek, dtd 10/23/81 3.
Proposed Revisions to Standard Tech Specs cc: J d tello, CRGR E. Jordan, IE D. Skovholt, NRR D. Brinkman, NRR s
P._Kellogg, RII S. Elrod, Res Insp R. Baer IE I
[Egclosure1
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? 'id SSINS No.: 6830 Accession No::
UNITEDSTATE}
7912190691 NUCLEAR REGULATORY COMMISSION 0FFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555
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April 1, 1980
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JE Circular No.,80.05
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.2 EMERGENCY DIESEL-GENERATOR LUBRICATING OIL ADDITION AND.,0NSITE SUPPLY _Lg:>b.u M $. P 'n D..:..:Descripdon of Circumsiiances5;MfM;.. ;a.,r-::..u'.:
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the"Kewaune'e Nuclear Power, Plant experienced a partial.G
- On January.17,1980,-
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' loss of offsite power which resultediint a. turbine trip, reactor trip,_ and one ' "
emergency diesel engine driven. generator-(diesel generator or D/G) supplying =
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power to one engineered ' safeguards bus; Offsite' power continued to supply the other engineered safeguards bus.
s' During the day before, on 1-16-80, this diesel generator had successfully completed a 24-hour loaded test run but had a low lube oil alarm condition with oil level 1/2-inch low.
The D/G was fully operational in this condition.
Before oil could be added on 1/17/80, the D/G was required for emergency power
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following the failure of the reserve auxiliary transformer.-
-The normal oil fill location could not be used while the D/G was operating.
The D/G Technical Manual (TM) indicated that oil could be added with the engine running, but did not describe the' method to be used.
Lube oil was added by pumping into the engine through a pipe that was assumed to be a lube oil line; this 'line was color coded.in the TM and painted with the lube oil system color code.
Three barrels of oil were added via this line while
. the D/G was operating.
After transferring the emergency bus to off-site power With the through the tertiary auxiliary transformer the D/G was shut down.
D/G shut down two more barrels of oil were added through this line without increasing the sump level.
Then two more barrels of oil were added through a differant addition point and the level was restored to normal.
4 The following day a factory representative determined that the first five A
y barrels of oil had been added to the engine air box through a mismarked Four and a
.(should have been color coded as an air line) drain connection.
E half barrels of oil were drained out after which the dhsel generator was -
4 It is believed that the diesel engine could satisfactorily test operated.
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have been damaged had an engine start been attempted while the five barrels of Further, it is noted that procedures for adding oil oil were in.the air box;
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to the 'perating diesel engine were not'available and that the personnel performing the addition were not familiar with, nor trained on, how to add oil o
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to a run-ing engine or how to verify that oil had been properly added.-
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. This event brought to light an additional problem which may be generic.
During the previous day's test run of the diesel generator lube oil consumption was approximately 3 gal /hr.
During the loss of power event, the licensee had three barrels (165 gallons) of lube oil available onsite.
The licensee's
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15CircularNo.80-05 April 1, 1980 Page 2 of 3 Technical Specifications require a seven day supply of fuel oil for one diesel generator be available onsite'.
To meet the intent of the Technical Sp,ecifica& ions, a seven day supply of,,1ube oil should also be available onsite.
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The diesel engines are model 999-20 manufactured.by the Electro-Motive Division of General Motors Corporation.
These diesel engines use a 2-stroke
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cycle and lube oil consumption is normally higher than for the 4-stroke cycle diesel engines.
Vendor represent'atives and NRC consultants indicate that lube M."
oil consumption rate varies with engine. condition and load.
Further, the 31.T e 1.4 h-;
gal /hr consumption rate.is considered to be in the normal.rangeJ,..;-
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L Recommended Action for Licensee's Consideration ~:
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_All holders of operating licenses for nuclear power reactor facilities should-be aware of the potential problems described above.
Because of the generic nature of these matters, it is recommended that the considerations identified l
~above be reviewed at your facility..in the following respects:
1.
Verify the existence and adequacy of procedures or instructions for adding lubricating oil to safety relat d equipment.
This should include the following:
I a)
Whether or not, how and where lube oil can be added while the
,_ equipment is in operation, f
b)
Particular assurance that $fe wrong kind of oil is n.ot inadvertently added to the lubricating oil system, and c)
That the expected rise in level occurs for each unit of lube oil added.
These operating procedures or instructions should be available locally in the area of the affected equipment.
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2.
Verify that personnel are trained in such approved procedures and demonstrate an ability for.using these procedures' to add oil white the D/G is operating and that they understand how to verify that the proper amount of oil has been added.
3.
Verify that.the color coded, or otherwise marked, lines associated with l,
the diesel generator are correct and that the line or point for adding lube oil has been clearly identified.
1 4.
Verify that appropriate procedures or instructions exist, and personnel are trained, on the proper addition of lube oil and.the performance of maintenance during operation of other similar vital equipment.
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- a IE Circular No. 80- 05 April 1, 1980 Page 3 of 3 5.
Determine the lube oil usage rate for each diesel engine under full load conditions including the rates considered to be excessive.
Provide adequate inventory of lubricating oil of the proper grade consistent with w.
the highest usage emergency diesel generator (s) operating for the time.
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period specified in the plant Technical Specifications for fuel oil supply.
When lube oil consumption rates become excessive, provisions.; ".
should be included for overhaul' of the diesel engine.
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Rfi'.'... All holder [
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of construc' tion permits for" nuclear" power reactor. facilities @ e':; 3 is.'-
245' " should,be, aware of the potential problems identified above and initiate" ;. ;1.ZTj" Q.E.~,
. appropriate. procedures prior to initial-fuel--loading., ---
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-::.~-y; No written response to this Circular'is required.
If youirequire additional
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.information regarding these matters, cont.act the Director of the appropriate L ~,;.
NRC Regional ~0ffice.
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