ML20009D520: Difference between revisions

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=Text=
=Text=
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BALTIMOR E GAS AND ELECTRIC i
BALTIMOR E GAS AND ELECTRIC i
CHARLES CENTER P. O. BOX 1475 BALTIMORE, MARYLAND 21203 ARTHUR E. LUNOVALL, JR.
CHARLES CENTER P. O. BOX 1475 BALTIMORE, MARYLAND 21203 ARTHUR E. LUNOVALL, JR.
VICE PREWDhNT SUPPLY Office of Nuclear Reactor Regulation                                     p       ,
VICE PREWDhNT SUPPLY Office of Nuclear Reactor Regulation p
U. S. Nuclear Regulatory Commission 9h Washington, D. C. 20555                                                         4
U. S. Nuclear Regulatory Commission Washington, D. C.
                  -Attn: Mr. D. G. Eisenhut, Director                                 'Of Division of Licensing                                                 @g\
20555 h
4 9
-Attn: Mr. D. G. Eisenhut, Director
'Of
@g\\
Division of Licensing


==Subject:==
==Subject:==
Calvert Cliffs Nuclear Power Plant                               4 Units Nos. 1 & 2, Dockets Nos. 50-317 & v1                       '/
Calvert Cliffs Nuclear Power Plant 4
Response to NUREG-0737 Item II.K.3.2           %              -
Units Nos. 1 & 2, Dockets Nos. 50-317 & v1
'/
Response to NUREG-0737 Item II.K.3.2


==Reference:==
==Reference:==
(a) Letter from A. E. Lundvall, Jr. to               -
(a) Letter from A. E. Lundvall, Jr. to
                                                                                                      /
/
D. G. Eisenhut dated February 20, 1981.
D. G. Eisenhut dated February 20, 1981.
Gentlemen:
Gentlemen:
Line 36: Line 43:
On page 8, the total nunber of MSSV demands is incorrectly reported to be 5650. The actual number is h650 demands (the sum of 2070_ MSSV test demands and 2580 operational demands). This also changes the failure rate from 1.2hx10-3 to 1.5x10-3 per demand.
On page 8, the total nunber of MSSV demands is incorrectly reported to be 5650. The actual number is h650 demands (the sum of 2070_ MSSV test demands and 2580 operational demands). This also changes the failure rate from 1.2hx10-3 to 1.5x10-3 per demand.
The conclusion of the report, that the failure rate is lover than the value of 2x10-2 per demand estimated in NUREG-0560, remains valid.
The conclusion of the report, that the failure rate is lover than the value of 2x10-2 per demand estimated in NUREG-0560, remains valid.
Very truly yours, A. E. Lundvall, J .
Very truly yours, A. E. Lundvall, J.
Vice President-Supply cc:   J. A. Biddison, Esquire G. F. Trowbridge, Ecqui                                                   g/
Vice President-Supply cc:
i Messrs. E. L. Conner, Jr. - NRC                                   -
J. A. Biddison, Esquire G. F. Trowbridge, Ecqui g/
O 'T b R. E. Architzel - NRC Resident Inspector 5
O 'T b Messrs. E. L. Conner, Jr. - NRC i
R. E. Architzel - NRC Resident Inspector 5
IO 0107240140 810714 PDR-ADOCK 05000 P
IO 0107240140 810714 PDR-ADOCK 05000 P
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Latest revision as of 00:05, 23 December 2024

Submits Corrections to 810220 Rept CEN-145 Re power-operated Relief Valve Failure Reduction.Rept Conclusions Remain Valid.Total Number of MSSV Test Demands Revised
ML20009D520
Person / Time
Site: Calvert Cliffs  Constellation icon.png
Issue date: 07/14/1981
From: Lundvall A
BALTIMORE GAS & ELECTRIC CO.
To: Eisenhut D
Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.K.3.02, TASK-TM NUDOCS 8107240140
Download: ML20009D520 (1)
v • d • e


Text

..

BALTIMOR E GAS AND ELECTRIC i

CHARLES CENTER P. O. BOX 1475 BALTIMORE, MARYLAND 21203 ARTHUR E. LUNOVALL, JR.

VICE PREWDhNT SUPPLY Office of Nuclear Reactor Regulation p

U. S. Nuclear Regulatory Commission Washington, D. C.

20555 h

4 9

-Attn: Mr. D. G. Eisenhut, Director

'Of

@g\\

Division of Licensing

Subject:

Calvert Cliffs Nuclear Power Plant 4

Units Nos. 1 & 2, Dockets Nos. 50-317 & v1

'/

Response to NUREG-0737 Item II.K.3.2

Reference:

(a) Letter from A. E. Lundvall, Jr. to

/

D. G. Eisenhut dated February 20, 1981.

Gentlemen:

Reference (a) forwarded CEN-lh5, PORV Failure Reduction Methods. This report requires correction.

On page 8, the total nunber of MSSV demands is incorrectly reported to be 5650. The actual number is h650 demands (the sum of 2070_ MSSV test demands and 2580 operational demands). This also changes the failure rate from 1.2hx10-3 to 1.5x10-3 per demand.

The conclusion of the report, that the failure rate is lover than the value of 2x10-2 per demand estimated in NUREG-0560, remains valid.

Very truly yours, A. E. Lundvall, J.

Vice President-Supply cc:

J. A. Biddison, Esquire G. F. Trowbridge, Ecqui g/

O 'T b Messrs. E. L. Conner, Jr. - NRC i

R. E. Architzel - NRC Resident Inspector 5

IO 0107240140 810714 PDR-ADOCK 05000 P

l:

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