ML19331C713
| ML19331C713 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/14/1980 |
| From: | Herbein J METROPOLITAN EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-16, TLL-361, NUDOCS 8008190426 | |
| Download: ML19331C713 (3) | |
Text
THIS DDCUMENT CONTAINS POOR QUAUTY PAGES Metropolitan Edison Company
- ia Post Office Box 480 l g[j cy
('
Middletown, Pennsylvania 17057 717 9444041 Writer's Direct Dial Nurnber August 14, 1980 TLL 361 Office of Inspection and Enforcement Attn:
B. H. Grier, Director Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pa.
19406
Dear Sir:
Three Mile Island Nuclear Station, Unit I (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 IE Bulletin 80-16 This 1cteer is in response to IE Bulletin 80-16 concerning the potential mis-application of Rosemount, Inc. pressure transmitters.
I.
Use of Rosemount Transmitters:
TMI-I uses four (4) of the Rosemount Model 1152 GP transmitters with output code A in the Reactor Protection System (RPS). The instrument tag numbers are RC-3A-PT1 & PT2 and RC-33-PT1 & PT2.
These instruments, via the Reactor Protection System, trip the reactor on high and low RC pressure. The high pressure trip setpoint is P > 2300 psig and the low pressure trip setpoint is P < 1900 psig.
II.
Effects of over and reverse pressure:
Neither the over pressure nor the reverse pressure conditions would pose any preblem in our application. The explanation follows:
A.
The Over Pressure Condition During an over pressure event, the ambiguous output does not occur until conditions exceed 140% of the upper range limit. indicates that the upper range limit of the model ll52CP9A92T0010PB transmitters in our application is 3000 lbs.
Therefore, the instruments must see P > 4200 lbs. before they would exceed the 140% of upper range limit. However, the 4200 lbs. pressure could not occur because the RC piping is designed for only 2500 lbs.
\\
B.
The Reverse Pressure Condition D \\
\\
During a reverse pressure event, the ambiguous output does not occur until conditions exceed 140". of the upper range limit of 3000 lbs. As a result, the instruments must sne P > 4200 lbs.
Ve:reco: tan E: rn emeany.s a Yemter at :ne "a! Mc Ua t es Syste iS008190 426
5 B. H. Grier TLL 361 (reversed) before they would produce ambiguous output.
In
" gauge-pressure" =easure=ent (as in our case), maxi =um reverse pressure would be one atmosphere which is 14.7 psia versus 4200 psig reverse pressure which the instru=ent can withstand without producing a=biguous output. Therefore, the reverse pressure required to produce an a=biguous output could net occur.
C.
Instrument Data 1.
Complete Model No:
Rose =ount Model 1152GP9A92T0010PB 2.
Transmitter Range Limits:
0-3000 PSIG 3.
Transmitter Range Setting (Calibrated Span):
1700-2500 PSIG 4.
Range of Process Variable Measured for:
(a) Normal Conditions - 1900-2300 PSIG (b) Accident Condition - 1900-2750 PSIG (Note that the high pressure reactor trip occurs when P > 2300 psig and the low pressure trip occurs when P < 1900 psig.
The 2750 psig is the upper limit during accident and is equivalent to 2500 psig RC syste= design pressure j
+ 107. allowable over pressuriza: ion.)
5.
Values of Process Variable which could produce Anomalous Indication: Over or reverse pressure greater than 4200 psig.
6.
Service / Function: RC Pressure-Narrow Range / Reactor Trip on high (P > 2300 psig) and low (P < 1900 psig) RC pressure.
III.
Description of Corrective Actions:
No corrective actions required.
For additional information, see Special Report 80-005/99X-0 (TMI-I) March 27, 1980 (TLL 132).
Sincerely,
$;gned J. G. Herbein J. G. Herbein Vice President TMI-I JGH:DCM: hah Attach =ent I
cc:
H. Silver M
l
- R. 'J. Reid l
J. T. Collins l
- 3. J. Snyder l
-. ~.
i Ordering information
_..TLL m MOctL
~'
t152 ALPHALING PREssVRt TR ANsedlTTERS FOft NUCLtAR APPUCATION$
CODE PRassuRE MEASUREMENr as'ereae.s Pressw e 2000 osy $tatic Presswee Ratiag ep e
MP O.rreeearias Pressuee 4500 os.g Static Pressure Ra: ag AP A3se6ute P* essure GP Gage P'essone PRE $$UPt RANGES CODE MODEL tis 20p '
.' MOost 11s2MP MootL 1152AP
- Moott 1152CP,
(OlFFERENTIAL)
(DePFERENTIAL)
.. (AS$CLUTt)
(GAGE) e 3
0-$ to 0-30 in M;O N/A N/A 0 S to 0 30.n. H,0 to-t27 to 0 62 mm M;OI (0127 to 0-752 mm M O) s 4
0-25 to 0-e50.a M,0 0'25 to 0 t50 in M,0 0 2 to 01 in. Hg A 0-25 to 01So on. M,0 a0435 to 0-3910 mm M,0)10-435 to 0-3sio mm M,0)
(049 to 0-380 g/cm3)
$635 to 0-3810 mm M,0) 0-t2S eq 0-750 m. M,0 0125 to 0150 n M,0 0-10 to 0-55 in M3A 0125 to 0-750 sa. H,0 10 3175 to 019053 mm M,06 (0 3175 to 0-19050 mm M,0)
(0-0 Ja5 to 0-t 889 kg/cm2) f0-3175 to 0-190$0 mm M,C) 6 0 t7 to 0.tCO ss.d 0-17 to 0100 ps.4 0-17 to 0 tCO es.a 0-17 to 0100 psio e
@I 2 to 0 r 0 ag cm:)
(0-12 to 0-F.0 h 3/cmil (01.2 to 0-7 0 ktcm2)
{0 t 2 t2 0-7 0 =g/cm )
1 0 50 to 0 300 es.d 0-50 to 0-300 ps.d 0-50 to 0 300 ps.a 0 50 to 0 300 ps.g to 3 5 to 0-21 = 3.cm*)
0 3 S to 0-21 ag,'cm2)
(3.5 to 21 kg/cm3)
(3 5 to 21 kgicen8) 0 0170 to 0-1000 ps.G N/A 0-170 to 0-1000 ps.a 0110 to 0-1000 ps g 10 t2 ts 0 70 =3'em )
(0-12 to 0 70 ag cm')
(012 to 0-70 kg/cm8) s 9
N'A N/A N/A 0-500 to 0-3000 ps g (0 3S to 0-210 m 3/cm*)
0 N#A N/A N/A 01000 t0 04000 ps.g
$To to 0-420 tg/cm8)
COCE OUTPUT v- '
.(
- ,f * *
.y A
a.20 mAOc 0
a 20 macc witri Acn stas
- Qamo.ng
,MATERl ALS OF CONSTRUCTit,N 6
,'I a
a CODE
."FL ANGt $
' DR AIN/vtNT VALVES ISOLATING OI APMR A3MS ELECTRONICS MOUS4*eG1
'COvtR$
22 31653 316$$
3165$
Aluminum 92 3teSS 3165$
316$$
Austenit.c sS COOT l OPTIONS ~
l Panet Mou riag Cracket Pe a
m 9152 OP 4
A 22 P8 TTPICAL UODEL Nuustm l
I STANDARD ACCESSORfES All Models are TAGGING ALPHALINE Pressure Transmitters will shipped with vent / drain va!ves and one instruction be supplied with SST tagging in accordance with manual per shipment-Customer requirements-i CALtBRATION Transmitters are factory calibrated DOCUMENTATION Certification of compliance to customer's specihed range. If calibration is not will be provided for each 1152 transmitter for nuclear specified, transmitters are caHbrated at maximum qualification. accuracy, special cleaning, hydrostatic range Cahbration is at ambtent temperature and testing, and traceability. Chemical and physical pressure.
reports and identification of pressure boundary materials will be on file at Rosemount.
uL V man b])[a1N.AS M -..t,'.,
a H C.
POST OFFICE Bot 35129 VINNDPOttS, MINNESOTA 55435 k
e y
i PHONE: (o12) 94155 60 Twx: 910 576 3103 TELEX:29-c183 CABLE: ROSEMouNT C.
- s Revised 9/79 l
-