ML20217D594
| ML20217D594 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 04/30/1998 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20217D587 | List: |
| References | |
| NUDOCS 9804240386 | |
| Download: ML20217D594 (5) | |
Text
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Docket No. 50-423 817001 Millstone Nuclear Power Station, Unit No. 3 Marked Up Technical Specification Page l
l April 1998 9004240386 980417 PDR ADOCK 05000423 PDR p
7/30/97 CONTAINMENT SYSTEMS BASES 3/4.6.4 COMBUSTIBLE GAS CONTROL (Continued) 1.
Definitions and constants CFM - cubic feet per minute RPM - revolutions per minute Blower RPM
'4550 Blower ft*/ revolution
.028 ft*
Standard CFM - gas volume converted to conditions of 68'F and 14.7 psia.
2.
Measure and record the following information:
Pcontainment--Avera;e of 3LMS*P934, 935, 936, and 937 (psia)
Pout--From 3HCS 1A or B (psia)
Tc--Containment temperature (*F)
Pin--Measure with a new inlet gauge or calculate from Equation 3a below (psia) scfm measured--See Procedure / Form 3613A.3-1 AP,--From Table 2 (psi)
A--As found Slip Constant Accuracy--Instrument accuracy range from Table 1.
3.
Calculate as found slip constant (A) a.
Pin - Pcontainment - AP, scfm Accuracy J4 l Tc 4 460 3550 -
ineasured a
0.028
- 0.55
, Pin 528 m
A=
Egyi, 14.7 ' - 14.7 %, ' le l, Tc + 460 'I a
,, Pin
, Pin 528 j
I i
et;ILLSTONE - UNIT 3 B 3/4 6-3a Amendment No. p. 142 I
7/30/97 CONTAINMERT SYSTEMS B'ASES 3/4.6.4 COMBUSTIBLE GAS CONTROL (Continued) 4.
Calculate expected postaccident flow rate using A calculated in Step 3.
a.
Slip RPM
- A * (4.937)%
- 1.218 b.
Actual Inlet CFM ACFM
.028 (3550 - Slip RPM) c.
Standard CFM scfm - ACFM 0.725 d.
Postaccident scfm Minimum - scfm
- 0.53 e.'
Acceptance Flow Rate Postaccident scfm minimum 1 41.52 scfm.
Table 1 Accuracy Range (Ref. 2) scfm (measured)
Accuracy Ra' nae
'O 30 10t-40 9 13 set e 40 to450 6 'll ul4dHeim So todbo 5 BI S&fr" 60 56 toL9% 90 617 S$'4r7-sefs Table 2 Inlet Piping loss (Ref.1) scfm Heasured AP, (psi)
(Unad.iust ed) 30
.21 40
.31 50
.52 60
.73 70
.98 80 1.28 4
References:
1.
Calculation 90-RPS-722GM, " Flow Acce 3HCS*RBNR 1A/B Blowers 3HCS* CIA /B." ptance Criteria for 2.
Calculation PA 90-L0E-0132GE, "Hyurogen Recombindh Flow Error Analysis.'
e The acceptance flow rate is the required flow rate at the worst case containment conditions 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after the LOCA. The analysis assumes the recombiners are started no later than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after the accident. The 4530 18-month surveillance shall verify the gas temperature and blower flow rate concurrently.
MILLSTONE - UNIT 3 8 3/4 6-3b Amendment No. 77,142 04M
t Docket No. 50-423 B17001 i
l l
M;llstone Nuclear Power Station, Unit No. 3 Retyped Technical Specification Page i
i April 1998
\\
CONTAINMENT SYSTEMS BASES 3/4.6.4 COMBUSTIBLE GAS CONTROL (Continued) 1.
Definitions and constants CFM - cubic feet per minute l
l RPM - revolutions per minute l
Blower RPM - 3550 1
8 l
Blower ft / revolution =.028 ft I
Standard CFM - gas volume converted to conditions of 68'F and 14.7 psia.
l 2.
Measure and record the following information:
l Pcontainment--Average of 3LMS*P934, 935, 936, and 937 (psia) l Pout--From 3HCS*PIIA or B (psia) l l
Tc--Containment temperature ('F) 1 Pin--Measure with a new inlet gauge or calculate from Equation 3a below (psia) j l
scfm measured--See Procedure / Form 3613A.3-1 AP,--From Table 2 (psi)
A--As found Slip Constant Accuracy--Instrument accuracy range from Table 1.
3.
Calculate as found slip constant (A) a.
Pin - Pcontainment - AP, b.
3550
'[ '
~
measured 14.7
- Tc + 460 ll 0.028
- 0.95 Pin 528 A-Ecut
- 14.7
- 14.7 % * ' M
- Tc + 460' Pin Pin 528 4
l i
1 MILLSTONE - UNIT 3 B 3/4 6-3a Amendment No. 77, Jf7 0500