ML20072A327
| ML20072A327 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 06/07/1983 |
| From: | Bradley E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8306100065 | |
| Download: ML20072A327 (3) | |
Text
1 PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101 cDw ARD G. B AUER, JR.
1215)841-4000 mmo same as counssk CUG ENE J. BR ADLEY assoceavs sansmat counsak DON ALD BLANKEN KUDOLPH A. CHILLEMB E. C. KIR K H A LL T. H. M AMER CORNELL PAUL AUERBACH assIsraNT GENER AL COUNSEL EDW ARD J. CULLEN. JR.
THOM AS H. MILLER, J R.
June 7, 1983 IRENE A. McKENNA assastant counss6 Mr.
A. Schwencer, Chief Docket Nos. 50-352 Licensing Branch No. 2 50-353 Division of Licensing U.
S.
Nuclear Regulatory Commission Washington, D.C.
20555 Subj ec t:
Limerick Generating Station, Units 1&2 Request for Information from the Accident Evaluation Branch (AEB)
Reference:
Telecon between L.
Bell and H.
D.
Honan on April 14, 1983 File:
GOVT 1-1 (FSAR)
Dear Mr. Schwencer:
The attached draft FSAR change is provided in response to an AEB request for information transmitted via the referenced telecon.
This change will be formally incorporated into the FSAR revision scheduled for July, 1983.
Sincerely, Euge e Bradley 8306100065 830607 PDR ADOCK 05000352 A
PDR HDH/gra/17 p
Copy to:
See Attached Service List I
If1 I
cc:
Judge Lawrence Brenner (w/o enclosure)
Judge Richard F. Cole Judge Peter A. Morris Tr.oy B. Conner, Jr., Esq.
Ann P. Hodgdon, Esq.
Mr. Frank R. Romano Mr. Robert L. Anthony-Mr. Marvin I. Lewis Judith A. Dorsey, Esq.
Jacqueline I. Ruttenberg l
Thomas Y. Au, Esq.
i Mr. Thomas Gerusky Director, Pennsylvania Emergency Management Agency Steven P. Hershey Charles W. Elliott, Esq.
Donald S. Bronstein, Esq.
Mr. Joseph H. White, III David Wersan, Esq.
Robert J. Sugarman, Esq.
Martha W. Bush, Esq.
Atomic Safety and Licensing Appeal Board Atomic Safety and Licensing Board Panel Docket and Service Section I
l i
c-e v e n. mve m/% mu-
, w p/n
%, q mu uss.
LGS FSAR A differential pressure sensor is provided to monitor dilution
(
air flow, which is an indication of blower operation.
The bleed valves are interlocked to remain closed on actuation of the upstream system until flow is established.
A low differential pressure indicates that the blower is not running, and the system valves remain closed, thus ensuring that the low-pressure manifold is always maintained at a negative pressure whenever the bleed valves are open.
Bleed valve reclosure is also initiated whenever dilution air flow is lower than a preset value.
The bleed line depressurization branch is terminated in the steam tunnel, which is served by the RERS.
The blower discharge line is also terminated in the steam tunnel so that the discharge flow is processed by the RERS.
i Manual switches are provided for testing the bleed valves.
These valves are not tested during plant operation.
This precludes inadvertent dumping of steam due to equipment malfunction or operator error.
6.7.2.3 System Operation l
(
Both the upstream and downstream MSIV-LCS are actuated manually with remote initiation switches by the operator (from the control room) after it has been ascertained that a LOCA has occurred, as evidenced by high drywell pressure and low reactor water level.
System operation starts provided that the main steam line and reactor vessel pressures are below the pressure permissive interlock setpoint.
n the % m,.m,rdownstream3 system, the valves in the depressurization m
ranch 'Ifne open' to ' permit the main steam line beyond the outboard MSIV to depressurize.
The blowers are started coincident with the system initiating switch actuation.
When the steam lines depressurize to approximately atmospheric pressure, the valves in the branch line to the blower open automatically and the valves in the depressurization branch close automatically.
This establishes a subatmospheric pressure in the main steam lines, and the MSIV leakage is routed to the SGTS.
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Rev. 10, 09/82 6.7-6
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