ML18139B099
| ML18139B099 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 02/07/1981 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Ferguson J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 8102270038 | |
| Download: ML18139B099 (2) | |
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UNITED~~TA_TE_S NUE'.LEAR REGUiJATORY <:;QMM!tSSION-
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WASHINGTON, D. C. 20555
. Docket Nos. 50-280
-and 50-281 Mr. J. H. Ferguson Exe.cutive Vice President-Power Virg.inia.Electric and Power Company Post Office Bbx 26666 Richmo~d, Virginia 23261
Dear Mr.* Ferguson:
- By letters dated March 29, 1977 and April 10, 1978, we requested that you provide informat,on regarding the status annunciator system for the diesel generators at *the Surry Power Station, Unit Nos. 1 and 2.
You *responded to our concern with the following response in your letters dated May 20, 1977, and May 23, 1978, as follows:
- 1.
The annunciator window for the respective emergency generator wi 11 be changed
- to read II AUTO START BLOCKED.
11 Concurrently the label plates on the Emergency generator control panels will be changed as follows:
. a.
For amber indicator 1 i ght, a _red 1 abel pl ate reading 11AUTO START UNBLOCK 11 will be installed.
- b.
For th~ associated push button a ~lack label reading 11AUTO START UNBLOCK 11 will be installed.
- 2.
From the station point of view, a facility change to separate cer-tain conditions under 11 EDG DIS-ABLED 11 annunciator would tend to downgrade the import~nce of lesser conditions that would remain under the 11 D/G TROUBLE 11 alarm.
The lesser conditions, however,
- have equal disabling potential.
It is presently station operating pol icy to consider 11 D/G TROUBLE 11 to be a disabling condition requiring positive immediate corrective action. This policy is dictated by and responds to the fact that any non-normal condition of the ~mergency diesel generator could
- l
- constitute a* Limiting Condition for Operation as stated in station 8 JO 2 A O
\\c::l_ Techni ca 1 Specifications. By ext ens ion, any non-norma 1 condition b') c,must be positively resolved in a timely manner.
OFFICE~
In reviewing the above response, we belive that in order to be provided with accurate, complete and timely information pertinent to the status 279--1971 the followin cor-I
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Mr. J. OFFICE~ * [)
- 1. Disabling and non-disabling conditions f~r each diesel generator should be separated and annunciated using separ-ate annunciator systems.
- 2. The wording on the annunciators for disabling conditions should specifically state that the diesel generait6Y'sis unabailable for automatic start.
- 3. Annunciators and alarms shall not be able to be cleared until a111abnorma1 conditions~aveRbeen corrected.
- 4. Consistent nomenclature for diesel generator annunciator wording should be used (D/G or EOG; but, not both).
- 5. The importance of the *amber' light indicator light for the luto Start Unblocl< should be reviewed relative to the importance of other colors (red, blue, etc~) used for similar blocked functions.
Therefore, we reiterate out request that you take measures to provide the status annunciator for the diesel generators with the requirements stated apove.
cc:
Sea-next page.-
Sincerely, Stevell A. Varga, Chief Operating Reactors Branch #1 Division of Licensing DISTRIBUTION:
Docket File 50-280/281 NRC PDR L FlDR TERA NSIC ORB#l :Rdg DEisenb,ut RPurpl e TN6vak RTedesco GLainas JHel temes OELD I &E ( 3)
SVarga DNei ghbors CParrish Gray File ACRS (16)
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SURNAME. * -~~~.,. *.. ~?.~~. *
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- DATE. 2/ (XI 81 2
NRC FORM 318 (10/801 NRCM:0240 OFFICIAL RECORD COPY
- USGPO: 1980-329-824