* Train and air traffic disruption expected
* Oil port strike in southern France enters 15th day
* Senate to approve second of two main clauses on Monday
By Helen Massy-Beresford
PARIS, Oct 11 (Reuters) - French unions geared up for more protest strikes this week over planned pension reforms, as the second of two key clauses of a bill to raise the retirement age was rushed through the Senate.
Transport workers planned to disrupt train and air travel on Tuesday and street protests were expected in a fifth wave of unrest over President Nicolas Sarkozy's push to make people work longer to ease the deficit in the pension system.
Across Europe, austerity measures to trim budget deficits have sparked public anger and protests.
Sarkozy's flagship pension bill is turning into one of the biggest battles of his presidency, pitting him against powerful unions who crushed a previous attempt to reform pensions in 1995 and weighing on his already low popularity ratings.
Already approved by the lower house of parliament, the reform is aimed at safeguarding France's cherished AAA credit rating, which enables it to borrow at low market rates.
The Senate is due to vote later on Monday on the second main provision of Sarkozy's pension reform, which would raise the age people can retire on a full pension to 67 from 65. The upper house passed a provision late on Friday to increase the minimum retirement age to 62 from 60.
Parliamentary approval of the entire reform is expected by late October, after which the bill goes to France's constitutional council for a final rubber stamp.
Sarkozy made a small concession in the pension bill last week to middle-aged women who had given up work to raise children, but his office says he has no intention of backing down on the essentials and is betting on protests waning.
TRAINS AND PLANES
Paris's RATP urban transport network said on Sunday the metro would be disrupted and some suburban trains would be hit.
National rail operator SNCF expected around one in three high-speed TGV trains to run. Around eight out of 10 Thalys trains to destinations including Brussels were expected to run, while Eurostar services were expected to operate as usual.
Flights would be cut by 50 percent at Paris's Orly airport on Tuesday and by 30 percent at CDG-Roissy and Beauvais airports, the DGAC civil aviation authority said on Monday.
Port strikes in southern France continued on Monday, as workers denounced port reforms as well as the pension bill.
A strike at the Fos-Lavera oil port entered its 15th day with no talks yet planned with port management, a CGT union spokesman said on Monday.
Some transport and energy unions have made more radical calls for rolling strikes from Tuesday, and the big trade unions have called a further day of protest on Oct. 16.
"This is one of the last chances to make the government retreat," Francois Chereque, head of the CFDT, one of France's main unions, told French iTele on Sunday.
A survey of just over 1,000 people published in Le Parisien newspaper on Monday showed 61 percent were in favour of a "continuous and lasting" strike, while 69 percent supported the planned strikes on Tuesday. (Writing by Helen Massy-Beresford; editing by Andrew Roche)